Patent Publication Number: US-2020302532-A1

Title: Electronic Spread Trading Tool

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application is a continuation of U.S. patent application Ser. No. 16/299,739, filed Mar. 12, 2019, which is a continuation of U.S. patent application Ser. No. 14/033,825, filed Sep. 23, 2013, now U.S. Pat. No. 10,275,829, which is a continuation of U.S. patent application Ser. No. 12/543,315, filed Aug. 18, 2009, now U.S. Pat. No. 8,666,872, which is a continuation of U.S. patent application Ser. No. 11/454,888, filed Jun. 19, 2006, now U.S. Pat. No. 7,590,578, which is a continuation of U.S. patent application Ser. No. 09/880,078, filed Jun. 14, 2001 in the name of Burns et al., entitled “Electronic Spread Trading Tool,” now U.S. Pat. No. 7,243,083. The contents of each of these applications are incorporated herein by reference in their entirety for all purposes. 
    
    
     BACKGROUND 
     A. Field of the Invention 
     The present invention is generally directed to the electronic trading of commodities, where a commodity includes anything that can be traded with quantities and/or prices. Specifically, the invention provides a trader with a versatile and efficient electronic spread trading tool to be used when buying and selling commodities of the same or similar class either simultaneously or in conjunction with one another. 
     B. Description of the Related Art 
     As the world&#39;s exchanges shift from open outcry to electronic trading, more and more traders participate in the market via a computer. Electronic exchanges have expanded direct access by allowing anyone with a computer and a connection to an exchange to trade directly in the exchange. Traders are now using software that creates specialized interactive trading screens on their desktops. The range and quality of features available to traders on their screens varies according to the specific software application being run. The installation of open interfaces in the development of an exchange&#39;s electronic strategy means users can choose, depending on their trading style and internal requirements, the means by which they will access the exchange. The electronic trading screens enable traders to enter and execute orders, obtain market quotes, and create and monitor positions while implementing various trading strategies previously used on the floor of an exchange. Such strategies incorporated into an electronic marketplace improve the speed, accuracy, and ultimately the profitability of trading electronically. One such trading strategy is spread trading. 
     A spread is simply the simultaneous buying of one commodity and the selling of another. To be a true spread, however, there must be some reason to believe that the conditions that will cause price movement in one contract will also cause price movement in the other. Spread trading is the process of protecting a position where an investment is made by taking an offsetting position in a related product in order to reduce the risk of adverse price movements. For example, a trader might simultaneously buy and sell two options of the same class at different strike prices and/or expiration dates. Typically, spread trading is used to describe a “short” position taken to offset a “long” position in the market. A long position is one where a trader has purchased a commodity at a specific price with the intent of selling that commodity at a higher price. A short position is one where the trader has effectively sold the commodity first with the intent of buying it later at a lower price. When trading stocks, the trader would take a short position by borrowing the stocks and selling them first. Later he would buy the same stocks back (hopefully at a lower price) to replace the ones he sold earlier. If trading futures, the short position could effectively entail a promise to sell a commodity (e.g. corn, soy beans, futures contracts themselves, etc.) at a certain (high) price and buying the same or comparable commodity at a given (lower) price. 
     Often traders will utilize spread trading to trade the yield curve for bonds or other debt securities. Typically, as the term of a security increases, the yield increases proportionately. This phenomenon can be charted on two axes (Price or Yield and Time) to create the “yield curve.” The yield curve often starts with the yield rates for the shortest term securities and extends towards longer term securities. It reflects the market&#39;s views about implied inflation/deflation, liquidity, economic and financial activity and other market forces. When the actual yield curve is disproportionate, traders may take long and short positions on different maturity dates to take advantage and manage their risk. The yield curve plots current yields of fixed interest securities against their times to redemption (maturity), and enables investors to compare the yields of short, medium, and long term securities at a given time. If short-term rates are lower than long-term, it is called a positive yield curve. If short-term rates are higher, it is called a negative, or inverted yield curve. If there is little difference, it is called a flat yield curve. 
     SUMMARY 
     The present invention can be summarized as a method of displaying, on an electronic display device, the market depth of a plurality of commodities including an anchor commodity and a non-anchor commodity, where the method includes dynamically displaying a plurality of bids and asks in the market for the commodities, statically displaying prices corresponding to those plurality of bids and asks, where the bids and asks are displayed in alignment with the prices corresponding thereto, displaying an anchor visual indicator corresponding to and in alignment with a desired price level of the anchor commodity, displaying a price level indicator corresponding to and in alignment with a price level of the non-anchor commodity. The price level for the price level indicator in the non-anchor commodity is determined based upon said desired price level of the anchor commodity. 
     In a further embodiment of the invention, the price level indicator also includes a first visual indicator corresponding to and in alignment with a first price level of the non-anchor commodity and a second visual indicator corresponding to and in alignment with a second price level of the non-anchor commodity. 
     Also, the invention includes a method of facilitating spread trading among a plurality of commodities, including an anchor commodity and a non-anchor commodity, using a graphical user interface and a user input device, where the method includes: displaying the market depth of those commodities traded in a market, through a dynamic display of a plurality of bids and asks for the commodities, including the bid and ask quantities of the commodities, aligned with static displays of prices corresponding thereto, determining a desired price level for the anchor commodity, displaying an anchor visual indicator corresponding to and in alignment with the desired price level of the anchor commodity, determining a price level for the non-anchor commodity based upon the desired price level for the anchor commodity, displaying a price level indicator corresponding to and in alignment with the determined price level of the non-anchor commodity, allowing the placement of a trade order of the anchor commodity through a single action of the user device with a pointer of the user input device positioned over an area in the dynamic displays of bids and asks in the market for the anchor commodity, allowing the placement of a trade order of the non-anchor commodity through a single action of the user device with a pointer of the user device positioned over an area in the dynamic displays of bids and asks in the market for the non-anchor commodity. Making the single action when the pointer is positioned at the location of the price level indicator allows for the placement of a spread trade. 
     These embodiments, and others described in greater detail herein, provide the trader with improved efficiency and versatility in placing, and thus executing, trade orders for commodities in an electronic exchange. Other features and advantages of the present invention will become apparent to those skilled in the art from the following detailed description. It should be understood, however, that the detailed description and specific examples, while indicating preferred embodiments of the present invention, are given by way of illustration and not limitation. Many changes and modifications within the scope of the present invention may be made without departing from the spirit thereof, and the invention includes all such modifications. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The foregoing advantages and features of the invention will become apparent upon reference to the following detailed description and the accompanying drawings, of which: 
         FIG. 1  illustrates two Mercury Display panes used in the preferred embodiment of the present invention; 
         FIG. 2  illustrates two additional display panes used in the present invention for allowing user input of various parameters; 
         FIG. 3  illustrates a common pane used for additional display and input of parameters; 
         FIG. 4  is a flowchart illustrating the method of using the present invention; 
         FIG. 5  illustrates a complete display of the preferred embodiment of the present invention; 
         FIG. 6  illustrates the range indicators feature of the present invention; 
         FIG. 7  illustrates examples calculations of price spreads between an anchor and a non-anchor commodity; 
         FIG. 8  illustrates a spread market display in accordance with a feature of the present invention; 
         FIG. 9  illustrates a portion of the market depth of two commodities; 
         FIG. 10  illustrates a portion of the trade amount and traded price of two commodities; and 
         FIG. 11  illustrates a traded spread display in accordance with a feature of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     The present invention (“Spread Tool”) builds on the innovations of a prior invention submitted by the owner as U.S. patent application Ser. No. 09/590,692 (“Click Based Trading With Intuitive Grid Display of Market Depth”) filed on Jun. 9, 2000, the contents of which are incorporated by reference herein. As set forth in the aforementioned application, the preferred embodiment of the intuitive grid display (also known as the “Mercury Display”) is a static vertical column of prices for a given commodity with the bid and ask quantities dynamically displayed in vertical columns to the side of the price column and aligned with the corresponding bid and ask prices. The application also describes a method and system for placing trade orders using such displays. 
     As described with reference to the accompanying figures, the present invention provides methods for displaying and trading that better facilitate spread trading among a plurality of commodities in the market. The spread trading tool of the present invention works with a variety of trading displays, and is particularly suitable for use with the Mercury Display which displays market depth on a vertical or horizontal plane, which fluctuates logically up or down, left or right across the plane as the market prices fluctuates. 
     The Spread Tool utilizes the graphic user interface described therein (the Mercury Display), and adds new features to facilitate spread trading. The Spread Tool enables traders to define and manage trading opportunities in the pricing of products for one or more markets. This feature will place two Mercury Display style panes side by side, with each pane serving as a leg in a spread. By showing market depth and market movements for both legs of the trader&#39;s spread, it will display opportunities that the trader can act upon. The Spread Tool is based on the daily net change differential between the legs, and maintains the same functionality that is currently available in the Mercury Display window, while adding market columns that are used to indicate price points. 
     In one aspect, the present invention overcomes the drawbacks of the existing trading systems and simultaneously displays the buy and sell opportunities of related commodities. A spread trade forms a position comparing two parts, each of which may profit from opposite directional price moves. As orders, these parts are entered and can be executed simultaneously in the hope of (1) limiting risk, or (2) benefiting from a change in the price relationship by legging (the separate execution of component parts of an entire position) at prices better than the prevailing spread market price. 
     Spread trading, as described herein, enables a trader to hedge against market losses should the market move against that trader&#39;s position. Essentially, hedging is an investment that is made in order to reduce the risk of adverse price movement by taking an offsetting position in a related commodity. Spread trading in general is a style of trading that allows traders to limit the risk of the positions they take in commodities by trading comparable commodities at comparable levels. A spread is intended to limit the amount of potential loss that a trader may incur. However, by simultaneously trading (buying and selling) similar commodities, and therefore offsetting a long position with a short position or vice versa, a trader may also limit their profitability (the maximum amount to be made). 
     The present electronic spread trading tool uses various settings, selected by the trader, to calculate a range (spread) that the trader can use in the simultaneous purchase and/or sale of related commodities by showing him where (at what prices) an order should be submitted. The settings that are used in the calculation of a spread within the preset invention include: Ratio, Anchor, Price Points On, Multiplier, Settlement, and Spread Price Point values (2 Buy and 2 Sell). The trader must designate one commodity as the “anchor” contract, which is the contract upon which the buy and sell levels are based. The trader then needs to select one option from a ‘Price Points On’ display and also a Ratio between the prices of each commodity. In addition, he needs to set the Spread Price Point values for his desired spread position. The present invention will then automatically place indicators (markers) on the Mercury Display by the appropriate price rows for each commodity in order to guide the trader&#39;s entry into in the market. The pre-determined ratio and values, entered by a trader, determine where the price markers are placed. The price markers give the trader a visual display of his intended positions, and based on where he entered the market in the anchor, he is shown where he should place an order(s) for the non-anchor in order to achieve his desired spread. 
     Although traders may trade more than two commodities at a time to conduct spread trades, and the present invention will allow for infinite numbers of commodities to be traded in a spread trade, for consistency and ease of reading, we will limit our examples and descriptions to spread trades involving two commodities. In addition, although the preferred embodiment of the invention calls for a vertical display of the prices in the market, they also could be displayed horizontally or in other ways, just as the Mercury display may be displayed in multiple ways. 
     In the preferred embodiment, when the spread tool is first invoked, a window composed of five panes will display on the trader&#39;s workstation. A typical display according to the present invention is shown in  FIG. 5 . 
     In the preferred embodiment, the present invention is implemented on a computer or electronic terminal. The computer is able to communicate either directly or indirectly (using intermediate devices) with the exchange to receive and transmit market, commodity, and trading order information. It is able to interact with the trader and to generate contents and characteristics of a trade order to be sent to the exchange. It is envisioned that the system of the present invention can be implemented on any existing or future terminal or device with the processing capability to perform the functions described herein. The scope of the present invention is not limited by the type of terminal or device used. Further, in the context of placing trade orders, a single click of a mouse as a means for user input and interaction with the terminal display is an example of a single action of the user. While a mouse click describes a preferred mode of interaction, the scope of the present invention is not limited to the use of a mouse as the input device or to the click of a mouse button as the user&#39;s single action. Rather, any action by a user within a short period of time, whether comprising one or more clicks of a mouse button or other input device, such as a keyboard, light pen, or a variety of other means, is considered a single action of the user for the purposes of the present invention. 
     The present invention includes the display of “market depth” and allows traders to view the market depth of one or more commodities and to execute trades within the market depth of the commodities. Market depth is defined as the order book with the current bid and ask prices and quantities in the market. In other words, market depth is each bid and ask that was entered into the market in addition to the inside market. For a commodity being traded, the “inside market” is the highest bid price and the lowest ask price. 
     The exchange sends the price, order and fill information to each trader on the exchange. The present invention processes this information and maps it through simple algorithms and mapping tables to positions in a theoretical grid program or using any other comparable mapping technique for mapping data to a screen. The physical mapping of such information to a screen grid can be done by any technique known to those skilled in the art. The present invention is not limited by the method used to map the data to the screen display. 
     How far into the market depth the present invention can display depends on how much of the market depth the exchange provides. Some exchanges supply an infinite market depth, while others provide no market depth or only a few orders away from the inside market. The user of the present invention can also choose how far into the market depth to display on his screen. 
     In the preferred embodiment of the invention, the spread tool window is composed of five panes. These are illustrated as  FIGS. 1-3 . Two of the panes (one for each leg) mirror the Mercury Display screen, two more panes serve as an attachment to the Mercury Display panes and contain various input fields, and the fifth pane, displayed as a common header pane, contains user input fields that pertain to the spread as a whole. The following section will provide an explanation and illustration of these input fields (settings). 
     To activate the present invention and begin spread trading, a trader would select comparable commodities (e.g. FGBM and FGBL) for which the working orders that are currently in the market at the selected exchange would be displayed on two parallel Mercury display panes  101  and  102  within the spread tool window. Each pane constitutes one leg of the spread and comprises a Bid column  111 , 112 , an Ask column  131 ,  132 , a Price column  121 ,  122 , a column for the last traded quantity  141 ,  142 , and columns for designating the trader&#39;s current bid  151 , current offer  161 , and the price level indicators  152 ,  162 . The price level indicators, which are calculated by the present invention using data that is input by the trader, will provide the trader with a visual representation of where he should trade based on his specified ratio. In addition, on each leg there is a column  171 ,  172  containing miscellaneous information such as the Net Position  175 ,  176  and the Order Quantity  173 ,  174 . The Order Quantity is the quantity that will be used when the next order for that leg is entered. The non-anchor quantity can be entered manually or autoloaded and calculated as follows: (anchor leg&#39;s net position/anchor leg&#39;s ratio)×(non-anchor ratio)−(net position of non-anchored leg). The Net Position is the difference between the total number of securities owned (long) and owed (short). 
     The two panes (one for each leg)  201 ,  202  attached to the Mercury Display panes ( FIG. 2 ) provide input fields that are used in the calculation of the price level indicators. The aforementioned input fields include Anchor  203 ,  204 , Ratio  205 ,  206 , Multiplier  207 ,  208 , Change  209 ,  210 , Close  211 ,  212 , Settlement  213 ,  214 , and product designations  215 ,  216 . A trader operating the present invention has the option of choosing either leg as the anchor contract by simply checking one of the two mutually exclusive anchor check boxes  203 ,  204 . The buy and sell levels will be based upon the anchor contract and the location of the spread point indicators will be calculated for the non-anchored contract. In the preferred embodiment, when the spread tool is first invoked, the contract that is displayed on the left side of the window will default to the anchor contract. The present invention contains two text boxes  205 ,  206  for entering the Ratio for the spread. Of the two values, one applies to each separate leg. For example, if the user enters 5 for the first leg and 3 for the second leg, then the ratio is 5:−3. The ratio applies to the net position for each leg. For example, if a trader wants to maintain the ratio, and is currently long 5 contracts for the first leg, then that trader should be short 3 contracts for the second leg. A trader wants to identify a quantity ratio that he believes captures the volatility relationship between the two products. The tendency of a product&#39;s price to rise or fall sharply within a short period is its volatility. The trader will want to tip the ratio in favor of the least volatile product. 
     A trader identifies a Multiplier  207 ,  208  in order to homogenize the products in terms of tick and currency differentials. For example, if one product is in Euros and another product is in U.S. Dollars, the Multiplier feature would be used to convert the two products into a uniform currency (e.g. both in U.S. Dollars). The Settlement text box  213 ,  214  displays the price of the last transaction for a given product at the end of a given trading session. If a Settlement value is not provided by an exchange, then the Close value  211 ,  212  will be used and will appear in the Close text box on each leg. The Change text box  209 ,  210  of the present invention displays the net change for each leg of the spread, and is calculated by subtracting the Settlement price from the Last Traded (Current) price. 
     The Common Pane  301 , as shown in  FIG. 3 , contains several user input fields that assist in determining the location of the spread&#39;s price indicators. These fields include Price Points On  310 , Autoload  320 , Current  350 , and Spread Price Point values  330  for the Spread. The Price Points On field is applied to the anchored contract and allows a trader to choose the pricing method that will be used to determine the price points for the other leg. The Price Points On  310  options include Best Bid/Offer  311  (from the market), Best Working  312  (uses the trader&#39;s best working orders from the anchor contract to determine the buy and sell price points for the opposite leg), and Manual  313  (the user manually selects the buy and/or sell price points for the anchor contract). The Spread Price Point values  330  indicate the range at which the trader is willing to buy and sell the spread. Two of the text boxes  331 ,  332  are for buy points, and two boxes  333 ,  334  are for sell points. As an example, the buy price level might be −15 and −1, whereas the sell price level might be set to 6 and 21. The −15 and −1 price level indicates that ideally the trader would like to buy the spread when the spread price point value is −15, but is willing to buy the spread at −1. Buying the spread in the present context means to purchase the anchor leg. Likewise, the 6 and 21 price level indicates that ideally the trader would like to sell the spread when the spread price point value is 21, but is willing to sell the spread at 6. Selling the spread in the present context means selling the anchor leg. 
     The Autoload feature of the present invention will automatically update the order quantity of the non-anchor leg based on a change in the net position. The Current  350  feature of the Common Pane  301  is a product of the spread and is calculated using the Current information from each of the two legs. The Current value of the spread is based on the net change of the two legs and is calculated by adding the ratio of leg  1  multiplied by the net change of leg  1  to the ratio of leg  2  multiplied by the net change of leg  2 . Current Spread Price Point Value=(leg  1  ratio*leg  1  net change)+(leg  2  ratio*leg  2  net change). 
     Calculating the Spread 
     The present invention facilitates spread trading by calculating a spread in the market that in turn is used by a trader to buy one contract and sell another. By calculating and then displaying price level indicators, the present invention provides a trader with an illustration of where he should trade based on his specified ratio. The calculation of the price level indicators is based on various data that is input by the trader and includes the Net Change, the Spread Price Point values and the Ratio. The following equations and examples serve to illustrate the process by which placement of the price level indicators in the present invention is calculated. 
     One of several values that factor into the calculation of the price level indicators is Net Change. Net Change is calculated by subtracting the Settlement price of a leg from the Theoretical Last Traded Price of that leg. The Theoretical Last Traded Price is equivalent to the price at which the ‘Price Points On’ indicator is located. In selecting from the ‘Price Points On’ options (Best Bid/Offer, Best Working, Manual), which results in the display of the anchor leg indicators, the trader is essentially asking the question “(theoretically) if I traded at this price on the anchor leg, then where would I want to trade on the corresponding leg?” Using the prices from  FIGS. 1-3 , and assuming the trader is entering the market on the Bid side of the anchor commodity, the Settlement price of 9224 would be subtracted from the Theoretical Last Traded Price  180  (in the Bid column  111 ) for the leg of 9220 to total a net change of −4. The equation would appear as follows: 
       Net Change for a leg=Theoretical Last Traded Price of the leg−Settlement price of the leg   [Eq. 1]
 
     The calculations of the Bid and Offer price level indicators are each two-part processes based on the Spread Price Point values. Referring again to  FIG. 1 , the trader is entered in the market with a Current price of 9220. When a trader enters the market on the Bid side of the anchor leg, the present invention will calculate the price level indicators for the Offer/Ask side on the non-anchor leg. There are a variety of formulas that can be used to calculate the non-anchor price level indicator. Typically, such formulas would include one or more of the factors described in Equation 2 below. In the preferred embodiment of the invention, the Spread Price Point value ( 331 - 334 ) would be subtracted from the anchor leg&#39;s ratio ( 205 ) multiplied by the anchor leg&#39;s net change (see Eq. 1). This total would then be divided by the non-anchor leg&#39;s ratio ( 206 ). The equation would appear as follows: 
       Non-Anchor Price Level Indicator=(Spread Price Point Value−(Anchor Leg Ratio*Anchor Leg Net Change))/Non-Anchor Leg Ratio   [Eq. 2].
 
     The actual price, at which the indicator is displayed, is calculated by adding the Price Level Indicator Value, as determined by the above equation, to the Settlement Price of the leg. Thus, in the above example, (−15−(5*−4))/(−3)=-−1.6666 (rounded to −2). Note: decimals will be rounded (e.g. 1.6666 is rounded to 2). 
     The first price level indicator, appearing as a colored marker ( 185 ), would then appear on the non-anchor leg next to the appropriate price level. In this case, since the calculation equaled −2, the price level indicator ( 185 ) would appear at  9865 , 2 less than the Settlement price on the non-anchor leg. 
     The second price level indicator ( 186 ) is calculated in the same way with the one exception being that the ‘Buy’ spread price point value of −1 ( 332 ) would be used in place of the −15 ( 331 ) spread price point value. The calculations for this second price level indicator would appear as follows: 
       (−1−(5*−4))/−3=−6.3333 (rounded to −6).
 
     As with the first price level indicator, the second indicator would appear as a colored marker ( 186 ) on the second leg at  9861 , 6 less than the Settlement price ( 214 ) on the non-anchor leg. The range would therefore be between  9865  and  9861  as shown in column  162  of  FIG. 1 . 
     To calculate the range for the Bid side of the non-anchor leg, the same calculations would apply as those used above except that the ‘Sell’ Spread Price Point values of 21 ( 333 ) and 6 ( 334 ) would replace the ‘Buy’ Spread Price Point values of −15 and −1 in the equations, and the Net Change would be calculated using the Theoretical Last Traded Price  181  from the offer column  131  of the anchor leg, which in the above example is  9221 . As shown in  FIG. 1 , column  152 , this results in a range on the Bid side of the Non-anchor commodity of  9860  ( 183 ) to  9855  ( 184 ). 
     The electronic spread trading tool, as developed by the inventors, aids in the process by which a trader protects a position where an investment is made by taking an offsetting position in a related product in order to reduce the risk of adverse price movements. The spread trading process, as defined by the present invention, is shown in  FIG. 4 . It begins when the spread tool is invoked and the trader has the market displayed on his monitor (step  402 ). As dictated by the present invention, the trader should have at least two related trading panes displayed within the spread tool application&#39;s window. The relation between the panes may be the display of comparable commodities, the display of identical commodities but from different exchanges, or some other relation. 
     To begin spread trading, in step  404 , a trader would designate one leg (order) as the ‘anchor’ commodity. Next, in step  406 , the trader would input a ratio representing the relationship between the commodities, where the numerator represents the anchor commodity and the denominator represents the second commodity (the other leg of the spread trade). 
     Referring again to  FIG. 4 , the trader would then select one option from the ‘Price Points On’ category in step  410  (the autoload blocks  428 ,  430  and  408  will be discussed later), which would place colored markers in separate columns of the anchor leg ( 151 ,  161  in  FIG. 1 ) corresponding to particular prices in the market depending upon the option chosen by the trader. If Best Bid/Offer were selected (step  412 ), the markers would appear next to the best bid currently in the market and the best offer currently in the market (step  422 ). Referring back to  FIG. 1 , the ‘best bid’ would be  9220  and the ‘best offer’ would be  9221 . If Best Working were selected (step  414 ), and if the trader is determined to have working orders in step  420 , then the markers would appear next to the best current bid and offer (step  424 ), which that particular trader currently had in the market. If there were no working orders determined (step  420 ), then the markers would be placed at the Best Bid/Offer (step  422 ). The Manual option (step  416 ), which is available if the best working is not selected in  414 , allows a trader to place a marker next to any of the price levels available in the market (step  426 ). If the Autoload feature, described in more detail herein, is activated (step  428 ), then, in step  430 , the non-anchored leg&#39;s quantity will be automatically updated. If it is not activated, then the user&#39;s input values will be used. 
     After selecting from the Price Point On options, the method proceeds to step  432  wherein the trader would enter values into the ‘Spread Price Point value’ boxes  330 . There are four boxes in all, with two being designated as ‘Buy’ points  331 ,  332  and two as ‘Sell’ points  333 ,  334 . In addition to Price Points On (Step  410 ) and Spread Price Point values step  432 , the trader may also select whether or not to activate the Autoload option, which is shown as step  408  but could be activated at any time. 
     As discussed above, the Multiplier in step  434  functions to equalize products traded in different currencies (e.g. Euros and U.S. Dollars) or different tick values by converting the two products to a uniform currency (e.g. both in U.S. Dollars) or identical tick value. This function is embedded in the Multiplier and therefore does not require intervention or input from the trader, although it can be implemented manually as well as automatically. Just as the Multiplier has an automatic input feature, so do the Settlement  213 ,  214 , Close  211 ,  212 , and Change functions  209 ,  210 . The Settlement feature is the price of the last transaction at the end of a given trading session, and is provided by the exchange. If the settlement is not provided by a specific exchange, then the Close price (closing price from the previous day) is used. The Change (Net Change) is also automatically calculated by as described above. 
     Once the input fields of the common pane ( FIG. 1 ) and the two panes ( FIGS. 2 and 3 ) attached to the Mercury Display are filled, it is then possible for the present invention to calculate the price level indicators. The present invention in step  438  would incorporate the parameters from the three panes described above to calculate the price level indicators for the buy and/or sell side of the commodity available in the second leg. The price level indicators would appear in the non-anchored leg, and would be displayed as two colored markers, much like those used to designate the Price Points On selection. The two indicators (markers) would represent the range of prices that the user should target when the user is attempting to trade the second, non-anchored, leg. These markers are simply guides, and the user has no restrictions on his ability to trade at price levels outside of the indicated levels. 
     Autoload 
     The ‘Autoload’ feature, as developed by the inventors, is initiated after a trader enters the market with a number of contracts (that he decides upon), and then attempts to buy or sell a specific amount of those contracts. The invention will automatically set the order quantity for the non-anchor contract (on the second leg)  174  when the user&#39;s net position in the anchor  175  contract changes. Based on the spread ratio ( 205 ,  206 ) specified by the trader and the current positions, the present innovation will calculate and populate the order quantity field  174  of the non-anchored leg. The Net Position of the trader is the trader&#39;s current position (in terms of the quantity of contracts purchased) on the chosen commodity. In other words, if a trader bought 10 more contracts of a commodity than he sold, the value of his Net Position would be 10. Similarly, if that same trader sold 10 contracts more than what he purchased, his Net Position would be valued at −10. 
     Reference is now made to  FIG. 5 , which illustrates all five display panes of the spread trading tool mentioned above and includes the elements listed with respect to  FIGS. 1-3 . To illustrate the present Autoload feature, consider a trader who is attempting to purchase  100  FGBM contracts shown as element  510 . FGBL  216  is a related commodity serving as a non-anchor commodity to the trader&#39;s anchor in FGBM  215 . FGBM/FGBL spread is currently set at a ratio of 5:3 shown in elements  205  and  206 , and the trader holds no position in either contract. If 50 of the 100 desired contracts are matched in the market and filled (hit; see element  173 ), the system will calculate an FGBL quantity to maintain the ratio of 5:3 set in  205  and  206  and in this case, automatically set to 30 (see element  174 ), thus saving the trader critical time in making his next non-anchored leg trade, because the quantity for that trade does not need to be manually set and the user can place his order with just a single mouse click. If the remaining 50 FGBM contracts were to be filled, the present innovation would then automatically change the order quantity of the FGBL from 30 to 60, thereby preparing the user to offset the long 100 FGBM position, and satisfying the 5:3 ratio spread after his next non-anchor order. 
     The Autoload feature will also load partial quantities in the non-anchor order quantity. These partial quantities are quantities that are not an integer multiple of the ratio for the anchor side. This helps lead the trader to obtain an eventual full-on spread. A full-on spread is one in which the desired ratio is perfectly in tact. A full-on spread occurs when a trader accumulates a full ratio quantity rather than a partial quantity. For example, when the desired ratio is 5:3, a full-on spread would be 50 long:30 short or 25 long:15 short. If the Autoload feature were to wait for the trader to accumulate a full ratio quantity on the anchor side, this might cause the trader to miss his chance to hedge his position. By providing a trader with more immediate amounts, it will help him to hedge his position a little at a time. 
     For example, if a trader enters numbers in ratio boxes  205  and  206  to effect a ratio of 4:3, the Autoload innovation will not require that the trader obtain a net position of 4 for the anchor contract before populating the non-anchor order quantity. If the trader was working four contracts on the anchor, but was filled on a quantity of three, the present innovation would not require that the one additional order be filled, but rather it would calculate the non-anchor&#39;s order quantity and populate the window  174  by a proportionate amount based on the three fills in the anchor. Table  1  illustrates how the non-anchored order quantity would be filled when a partial fill occurs in the anchor contract. As is shown, the non-anchor order quantity is proportionate to the current net position in the anchor commodity in accordance with the set ratio, and is revised to the nearest integer. 
     
       
         
           
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                 Current (Net) Position for Anchor 
                 Autoload Quantity for Non-Anchor 
               
               
                   
               
             
            
               
                 1 
                 1 (1*¾) 
               
               
                 2 
                 2 (2*¾) 
               
               
                 3 
                 2 (3*¾) 
               
               
                 4 
                 3 (4*¾) 
               
               
                 5 
                 4 (5*¾) 
               
               
                 6 
                 5 (6*¾) 
               
               
                 7 
                 5 (7*¾) 
               
               
                 8 
                 6 (8*¾) 
               
               
                   
               
            
           
         
       
     
     In the present feature of the invention, trades do not necessarily occur in the second leg, and orders are not automatically sent to the market. Instead, the order quantity for each leg of the spread is merely calculated and placed into the Order Quantity window  174 . For an actual order (at the calculated quantity) to be sent to market, the trader would use the order entry functionality of the Mercury Display application. 
     Price Level Indicators 
     The ‘Price Level Indicators’ feature, as developed by the inventors, provides a means by which a trader can set buy and sell price points for the spread. Referring again to  FIG. 5 , the price level indicators are displayed as colored markers  511 - 516  and appear in each contract in columns separate from the ‘Bid’  111 ,  112 , ‘Offer’  131 ,  132 , and ‘Price’  121 ,  122  columns. The position of the marker in the anchored contract helps to determine the placement of the markers in the non-anchor contract (leg). Their exact location is based on the ‘Price Points On’  310  that is selected. If the Best Bid/Offer mode  311  is selected, and orders in the market continue to change as new orders are placed and filled, the markers  511 ,  512  will track or move with the Best Bid/Offer price(s). If Best Working  312  is selected, the markers  511 ,  512  on the anchor leg will remain at the trader&#39;s best working bid and offer that are in the market. If Manual  313  is selected, the user will be able to manually select the buy and sell price points of his choice. Regardless of the method, the present invention will use the anchor price points corresponding to the markers  511  and  512  to calculate the price level indicators&#39; locations  513 - 516  in the non-anchored contract. For example, if the trader selects Best Working  310  and enters the market, and gets filled on the bid side  151  of the anchor leg, a marker  511  will be displayed both at the price where he was filled and at each end of the calculated price level indicator prices  515  or  516  on the ask (offer) side  162  of the corresponding leg. Similarly, if the trader enters the market on the ask (offer) side  161  of one leg, markers will be displayed at both the point in which he entered the market  512  and at each spread price  513  or  514  point on the bid side  152  of the corresponding contract. 
     The location of the Price Level Indicators, as based on the ‘Price Points On’  310  option that is selected by the trader, is dependent on the trader having, or not having, a fully hedged position on the anchor leg. In other words, the price level indicator will only remain at the Best Bid/Offer  311 , Best Working  312 , or Manual price  313  if the trader&#39;s designated ratio is maintained. For example, if a trader has a ratio of 5:3 set in  205 / 206 , and he buys (fills) 5 contracts, the system calculates that he will need to sell  3  contracts in order to be fully hedged (thus keeping the marker at the ‘Price Points On’ price). Likewise, if that trader buys 10 contracts, he would need to sell  6  contracts. If the trader fills orders on only one side of the ratio, he will be unhedged, and the location of the Price Level Indicator  511 ,  512  will not reside at the ‘Price Points On’  310  price, but will instead reside at the last traded price average price of the filled, unhedged position. For example, if a trader has selected Best/Bid Offer  311 , and the best bid is a price of 9221 in column  121 , then the marker  511  will reside at  9221 . If that trader (with a 5:3 ratio) in  205 ,  206  buys 5 at a price of 9224, but does not sell any on the non-anchor, the marker  511  will reside at the  9224  price in column  121 . In addition, it is also possible for a trader to continue to buy multiple contracts while selling none. In cases like this, the price level indicator will reside at the average price level of those filled buy orders. For example, the trader discussed above may begin by buying 5 contracts at a price of 9222 in column  121 . He then may buy another 5 at a price of 9224 in column  121 , and still another 5 at a price of 9226. The price level indicator  511  would then reside at the weighted average price of these three separate buy orders, which would be  9224 . Assume, for example, that after filling these three buy orders, the trader fills a sell order in the non-anchor commodity for a quantity of 3. This will then hedge the first order ( 9222 ), and calculate a weighted average so that the level indicator  511  will now reside at the weighted average of the other two orders,  9224  and  9226 , which would be  9225 . 
     As discussed above, there are several factors involved in determining the placement of the markers in the non-anchored contract, including the Ratio, the Price Points On selection, the Net Change, and the Spread Price Point values. These factors are used to calculate the price level indicators, thereby determining the placement of the markers on the non-anchored contact. 
     The present invention lets a trader set up two different ‘Buy’ levels  331 ,  332  and two different ‘Sell’ levels  333 ,  334 , which constitute the price ranges in which the trader wants to buy and sell the spread. For example, assume that a trader set the ‘Buy’ Spread Price Point values to −15 and −1 in  331  and  332 , and he set the ‘Sell’ Spread Price Point values to 21 and 6 in  333  and  334 . The “−15” and “−1” ‘Buy’ Spread Price Point values  331 ,  332  indicate that ideally the trader would like to buy the spread when the spread price point value is −15, but he is willing to buy the spread at −1. Buying the spread in the present context means to purchase the anchor leg. Likewise, the “21” and “6” ‘Sell’ Spread Price Point values  333  or  334  indicate that ideally the trader would like to sell the spread when the spread price point value is 21, but he is willing to sell the spread at 6. Selling the spread in the present context means selling the anchor leg. 
     Range Indications 
     The ‘Range Indications’ feature shown in  FIG. 6 , as developed by the inventors, provides a trader with a vertical display of a market&#39;s prices while also providing a visual reference as to which prices the commodity is most often traded. The vertical layout applies to both legs of the spread and displays the prices for contracts for both of the commodities from the top of the panes to the bottom. The prices displayed in the price column  640  begin with the largest price  645  at the top of the column and descends as the price level decreases. 
     To distinguish a price point at which a large percentage of the daily volume has traded, from a price point at which little volume has traded, the present innovation incorporates the use of colors. Particular colors, which are chosen by the trader, differentiate the price points. Colors are used to represent the percentage of the daily volume that has traded at a particular price(s). Each price is colored depending on the quantity that is traded at a particular price or group of prices. In place of or in addition to color, other ways can be used to distinguish a price point. For example, the background color of the prices could differ, or there could be some other convenient visual indicator at or in adjacency to the pertinent price groups, such as the use of a different font, type of underlining or circling. 
     In the sample display using range indications shown in  FIG. 6 , the trader may want to view the daily trade volume of a particular commodity, and he may also want to see that volume divided into a plurality, such as, for example, three easily distinguishable groups of prices ranging from the most heavily traded volume for the day to the lightest. In embodiment, the present feature gives the trader the option of deciding how large he wants a group of prices to be and in what color or other visual designation he wants each group to be depicted. As illustrated in  FIG. 6 , the trader chose to divide the daily trade volume into three price groups: A) 70%, B) 20%, and C) 10%. Group A (element  610 ) represents the prices where 70% of the trading volume occurred for that day. Group B (element  620 ) represents the 20% of prices  640  that had the next heaviest amount of trading for the day, and Group C (element  630 ) represents the 10% of prices  640  that saw the lightest amount of trading. It should also be noted that each group may be dispersed throughout the market depth. For example, Group A may include price levels at  9217  and  9233 , and Group B might be the price level  9221  while Group C is at price levels  9227  through  9231 . The volume of trading may not always follow a true “bell-curve” where the most traded prices are grouped together. Instead, frequently the volume ebbs and flows at various prices in the market. In the preferred embodiment, the prices are arranged in descending order by volume and the percentile groupings are made by accumulating the values into the percentiles selected by the user. As shown to the trader, however, the prices are displayed in numeric order. The trader who is operating the application determines the colors or other visual indicators that are applied to the prices shown in column  640 . 
     In one embodiment, a trader is provided access to the prices for the duration that the application is open. If the application is opened during the middle of the day, price information from the beginning of the day will not be available. This may be varied and is a design choice. 
     Drag and Drop 
     The ‘Drag and Drop’ feature is the ability to drag and drop Price Level Indicators  511 - 516  of  FIG. 5  from one price level to another price level. The feature is performed on either of the Mercury Display panes  101  or  102  shown in  FIG. 5 , and in the preferred embodiment, is currently carried out by clicking on the left button of a user&#39;s mouse. While holding down that left mouse button, the trader would drag the Price Level Indicator  511 - 516  to a different price  121 ,  122  and release it when the marker is along side his desired price. The ‘Drag and Drop’ functions may also be effected by designated keystrokes on a trader&#39;s keyboard or through other actions performed by the trader. 
     On the anchor leg  101 , a trader conducting the ‘Drag and Drop’ feature will perform the same functions as if he had selected the ‘Manual’ option  313  from the Price Points On options  310 . The placement of the price level indicators  511 ,  512  will also be calculated as if the ‘Manual’ option  313  were selected. 
     A trader may also choose to ‘Drag and Drop’ one or more price level indicators on the non-anchored leg  102 . When such an action is performed, the Spread Price Point value associated with the specific indicator  513 - 516  that was moved, will be altered. As described above in Equation 2, a Price Level Indicator would be calculated as follows: 
       Non-Anchor Price Level Indicator=(Spread Price Point Value−(Anchor Leg Ratio*Anchor Leg Net Change))/Non-Anchor Leg Ratio.
 
     By dragging and dropping a Price Level Indicator  513 - 516  on the non-anchored leg  102 , a trader has, in essence, defined the Price Level Indicator leaving the Spread Price Point value  330  to be determined. The Price Level Indicator, as defined by the following calculation, is the price level at which a trader has dragged and dropped an indicator  513 - 516 . For example, when a trader drags and drops an indicator from a price of 2100 to a price of 2120, the price level of the Price Level Indicator would be  2120 . In addition, the Anchor Spread Point Indicator  511 ,  512  refers to the price level, on the anchor leg, where the price indicator is resting. For example, if a user has been filled at  1000 ,  1200 , and  1400  (1 lot at each price), the Anchor Spread Point Indicator  511  or  512  would be resting at  1200  (the average price of the fills). There are a variety of formulas that can be used to calculate the Spread Price Point values. Typically, such formulas would include one or more of the factors described in Equation 3 below. By way of example only, the following calculation would determine the Spread Price Point  331 - 334  value when the Price Level Indicator  513 - 516  is known. 
       Spread price point value=(Price Level Indicator*Non-Anchor Leg Ratio)+(Anchor Leg Ratio*Anchor Leg Spread Point Indicator)   [Eq. 3]
 
     Spread Market Display 
     The ‘Spread Market Display’ feature, as developed by the inventors, provides a trader with a window display that illustrates where the current spread is trading, while also showing the market depth as related to that spread. Market depth represents each bid and ask entered into the market that is not the inside market (the best bid price and quantity and the best ask price and quantity). The present feature, using the market depth from each leg that makes up the spread  710  and  720 , calculates the spread  730  by subtracting one leg  720  from another  710  as shown, for example, in  FIG. 7 . The labels A-F ( 731 - 736 ) pointing to various spread prices correspond to examples A-F described below. 
     An example of such a Spread Market Display is shown in  FIG. 8 . The middle column  810  is the spread price. This list of prices is also the market depth. The left column  820  is the bid column and displays the bid quantity currently available in the market (where the spread is trading) for that spread price. The right column  830  is the ask (offer) column and displays the offer quantity currently available in the market (where the spread is trading) for that spread price. The box  840  above the center column lists the commodity(s), and the box  850  to the right of box  840  displays the trader&#39;s ratio. The actual numbers shown in the display of  FIG. 8  correspond to and are explained in the context of the examples to be described herein. 
     The current market spread is dependant on the best price point for the commodities at which a trader is presently trading. A trader entering the market on the bid side is looking to buy at the lowest offer (ask) price in the market, whereas a trader entering the market on the offer side is looking to sell for the highest bid price in the market. This feature of the present invention always begins with the best bid and best offer and calculates the spread based on both. For example, referring again to  FIG. 7 , and as calculated above, a trader who is entered in the market at the FGBL price of 9861 (best bid) column  710 , when the corresponding leg (FGBM) column  720  has quantity available at the best offer ( 9221 ), will be trading on a spread of 640 (see column  730 ). As orders are filled and price levels in the market are “zeroed out”, the best bid and best offer prices change (bid prices get lower as they are zeroed out, and offer prices get higher), and that results in a change in the spread. ‘Zeroed Out’ means that all of the quantity that was previously in the market for a specific product, and at a specific price, has been either bought or sold, and a quantity of  0  (zero) remains. Prices from the contracts that are used in the calculation of the spread, and ultimately in the market depth, can be rounded and displayed at whatever value the trader chooses (e.g. half ticks). 
     The present feature, which operates as part of the spread trading tool and creates its own market depth and spread from two similar contracts, does not require a trader to be entered in the market in order to view the Spread Market Display window  800  of  FIG. 8 . The illustrations in  FIGS. 7-9  depict the display of two similar contracts, FGBM and FGBL  920  and  910  in  FIG. 9  and the sample spread calculation display (see  FIG. 7 ), and are presented as references to the examples that follow. 
     Examples A, B, and C are based on a trader entering the market on the bid side  912  of the FGBL leg  910  at the best bid price of 9861 (column  914 ). 
     It is important to note that for the purpose of illustration the following examples refer to a trader who has entered the market. However, the Spread Market Display information is available to any trader running the present application, and it is not necessary for that trader to be entered in the market in order to view the Spread Market Display window  800  of  FIG. 8 . Therefore, references to such are for the enhanced illustration of the innovation&#39;s process only. The present innovation will calculate market spreads  840  and display them in conjunction with the market&#39;s depth  820 ,  830  irrespective of whether or not a trader is actively involved in the market. 
     Example A: As mentioned above, the present innovation always begins with the best bid and best offer (and calculates the spread based on both). Therefore, a trader entering the market at the best bid price  911  ( 9861 ) would have that price matched with the best offer price  921 . In the present example, that best offer price would be  9221 . The best offer ( 9221 ) would be subtracted from the best bid price ( 9861 ) to determine the spread on which the trader would be trading ( 640 ). See Line A  731  of  FIG. 7 . The bid quantity  913  of 100 displayed on the FGBL leg  910  at the price point  911  where the trader entered the market, would suggest that the trader was interested in buying a quantity of 100 contracts from the corresponding FBGM leg  920 . Because the present feature begins with the best bid and best offer, the application would look to make a match at the best offer price  921  ( 9221 ) on the corresponding FBGM leg  920 . The FBGM best offer price ( 9221 ) currently has 65 contracts available  923 , and therefore since corresponding bids and offers would exist, a match would be made. The match would result in all 65 FBGM best offer ( 9221 ) contracts  923  getting sold (zeroed out), a new FBGM best offer price being established ( 9222 ), and the desired quantity of 100 (at the best bid price of 9861) getting reduced to 35 contracts. 
     Example B: As a consequence of the market changes described in Example A, and particularly the change in best offer price from  9221  to  9222 , the present feature would automatically calculate a new spread. The spread ( 639 ) is determined by subtracting the best offer ( 9222 ) from the best bid ( 9861 ). See Line B  732  of  FIG. 7 . As displayed in  FIG. 9 , the best offer price  925  ( 9222 ) currently has a quantity of 30 contracts available  927 . Since the trader, still entered in the market, would still be looking to buy 35 contracts, and 30 contracts  927  would be available at the new best offer price, another match would be made. The result of this match would be that all 30 contracts at the best offer price  925  ( 9222 ) would be zeroed out, therefore reducing the trader&#39;s desired bid quantity from 35 to 5 contracts, and creating a third new best offer price of 9223. 
     Example C: As a consequence of the changes in the market resulting from the activity described in Example B, and particularly the change in the best offer price from  9222  to  9223 , the present innovation would automatically calculate a new spread. The spread ( 638 ) is determined by subtracting the best offer ( 9223 ) from the best bid ( 9861 ). See Line C  733  of  FIG. 7 . As displayed in  FIG. 9 , the best offer price  928  ( 9223 ) currently has a quantity of 50 contracts available  929 . However the trader, in the market at the best bid price  911  ( 9861 ), would only be looking to buy (fill) the 5 remaining contracts from his original bid. Since 50 contracts are available  929  at the corresponding best offer price  928 , and the trader has a bid entered in the market at the best bid price, a match would be made, the result of which would include the best bid price  911  ( 9861 ) getting zeroed out. In addition, and as a result of the aforementioned market activity, the best offer price  928  ( 9223 ) would remain the best offer but would be reduced from 50 to 45 contracts, and the best bid price would become  9860  (the next largest available bid price  915 ). 
     Referring again to  FIG. 8 , in Example A, the trader was trading at a spread price of 640 and he zeroed out the quantity. Thus, as shown in  FIG. 8 , the spread price of 640 (column  840 ) has no (zero) quantity displayed in column  820 . In Example B, the same happened since the 30 contracts were zeroed out, but in Example C only 5 out of 50 contracts were sold, leaving a quantity of 45. Thus, 45 is shown in column  820  next to the spread price of 638 (column  840 ). 
     Examples D, E, and F are based on a trader entering the market on the offer side  916  of the FGBL leg  910  at the best offer price  917  of 9862. 
     Again, it should be noted that a trader need not be entered in the market in order to view the Spread Market Display window  800 , and therefore any references to such are for the enhanced illustration of the innovation&#39;s process only. The present feature will calculate market spreads  840  and display them in conjunction with the market&#39;s depth  820 ,  830  irrespective of whether a trader is actively involved in the market. 
     Example D: Similar to the manner in which the present feature operates when a trader enters the market at the best bid price, a trader entering the market at the best offer price would have that price matched at the best bid price on the corresponding leg. In the present example, that best offer price  917  would be 9862. The best bid  930  ( 9220 ) would be subtracted from the best offer price  917  ( 9862 ) to determine the spread on which the trader would be trading ( 642 ). See Line D  734  at  FIG. 7 . The offer quantity  918  of 100 displayed on the FGBL leg  910  at the price point  917  where the trader entered the market, would suggest that the trader wanted to sell 100 contracts. Again, because the present innovation begins with the best bid and best offer, the application would look to make a match at the best bid price  930  ( 9220 ) on the corresponding FGBM leg  920 . At the FGBM best bid price  930  ( 9220 ) a trader is interested in buying 25 contracts  932 , and therefore since corresponding bids and offers exist, a match would be made. The match would result in all 25 FGBM best bid ( 9220 ) contracts  932  getting zeroed out, a new FGBM best bid price  931  being established ( 9219 ), and the desired FGBL sell quantity  918  of 100 getting reduced to 75 contracts. 
     Example E: As a consequence of the market changes described in Example D, and particularly the change in the best bid price from  9220  to  9219 , a new spread would be calculated. The spread of 643 would be calculated by subtracting  9219  (the best bid) from  9862  (the best offer). See Line F  735  of  FIG. 7 . The trader, who entered in the market at  9862  (the best offer price  917 ) and filled 25 of his 100 offer (ask) contracts  918 , would have an order of 75 contracts remaining. On the corresponding FGBM leg  920 , and at the new best bid price ( 9219 ), a trader has a bid order  933  of 100 contracts, which would be matched with the 75 FGBL contracts. As a result of the aforementioned match, the best offer  917  ( 9862 ) would be zeroed out and the best bid price  931  ( 9219 ) would be reduced from 100 to 25 contracts. In addition, the new best offer price  919  would become  9863  (the lowest available offer price). 
     Example F: As a consequence of the changes in the market resulting from the activity described in Example E, and particularly the change in the best offer price from 9862 to 9863, a new spread would be calculated. The spread ( 644 ) is determined by subtracting the best bid ( 9219 ) from the best offer ( 9863 ). See Line F  736  of  FIG. 7 . The trader, entered in the market at the best offer price  919  ( 9863 ), currently has an order  909  for 15 contracts in the market. On the corresponding leg  920 , a trader entered at the best bid price  931  ( 9219 ), currently has an order of 25 contracts in the market. Since contracts are available at the coinciding best bid and best offer prices  931  and  919 , a match would be made, and as a result the best offer price  919  ( 9863 ) would be zeroed out and the best bid price  931  ( 9219 ) would be reduced from 25 to 10 contracts. 
     Referring again to  FIG. 8 , in Example D, the  642  spread price (column  840 ) was zeroed out. Thus, no quantity is shown next to the spread price of 642. In Example E, the same occurred. Thus, no quantity is shown next to the spread price (column  840 ) of 643. In Example F, however, 10 contracts remain (column  830 ) at a spread price of 644 (column  810 ), and is shown accordingly in  FIG. 8  (column  830 ) next to spread price  644 . 
     Traded Spread Display 
     The Traded Spread Display serves to provide a trader with historical data illustrating specifically where a spread could have traded. A trader operating the present Spread Tool invention will have two corresponding trading screens  101  and  102  (legs), as referenced throughout this document, displayed on his workstation&#39;s monitor. From those screens the trader is able to buy and sell commodities simultaneously. The displaying of information, as related to the present feature, is based on the best prices in the market, and the feature will display both the spread price and the total quantity traded at that spread price. To illustrate the present innovation, the displays shown in  FIG. 10  are used, which represent the two markets  1010  and  1020  used as the spread legs. 
     The ‘Traded Spread Display’ feature, an example of which is shown in  FIG. 11 , provides a trader who is operating the present invention with an additional window display  1100  that illustrates where a spread has traded throughout the day. More specifically, the window displays spread prices  1110  and quantities  1120  as they are traded in the market. 
     Spread prices are determined by subtracting a price point shown in  FIG. 10  on one leg  1020  from a price point on the other leg  1010 . This calculation initially incorporates either the best bid for each leg or the best ask (offer) for each leg. In  FIG. 10 , the bids are shown in one color while the asks/offers are shown in another color. As prices are zeroed out, new best prices will be created and the spread will be recalculated using either the new best bid or best offer prices. Prices are zeroed out when the entire quantity associated with that price are either bought or sold, leaving a total quantity of zero. The quantities  1120  displayed are the total number of contracts that have traded throughout the day at each particular spread price. The ‘Traded Spread Display’  1100  will maintain a running total of the quantities for each of these applicable spread prices. For example, if a spread trades at a price level of 340 (column  1110 ) and at a quantity of 15 (column  1120 ), the trade would be recorded and displayed in the ‘Traded Spread Display’  1100 . If one hour later the spread were to trade again at  340 , and would trade this time at a quantity of 12, then the display would change from 15 to 27 for the traded quantity Column  1120 . 
       FIG. 10 , in which Contract A  1013  has a best bid price  1014  of 9859 and a best ask (offer) price  1015  of 9860, and Contract B  1023  has a best bid price  1024  of 9517 and a best ask price  1025  of 9518, further illustrates the calculation and display of the spread price  1110  and quantity  1120 . If, for instance, 10 contracts trade on the  9859  bid price of Contract A  1013 , then the buyer could sell 10 contracts at the  9517  bid price on Contract B  1023 . In this scenario the spread would have traded  10  times at a price of 342 ( 9859 - 9517 ). If, for example, all 50 contracts  1016  would have traded at the  9859  price ( 1014 ), then the buyer could only have sold 35 contracts at the  9517  price ( 1024 ) since that is the maximum quantity available  1026  on Contract B  1023  and at that price  1024 . In this scenario the spread would have traded 35 times at  342  as is shown in columns  1110  and  1120  of display  1100 . The trader could then sell 8 contracts at  9516 , see columns  1021  and  1022 , with the spread trading 8 times at  343 , see columns  1110  and  1120  ( 9859 - 9516 ). Finally, selling his remaining 7 contracts at a price of  9515 , see columns  1021  and  1022 , could zero the trader&#39;s order out, resulting in the spread trading  7  times at  344  ( 9859 - 9515 ), see columns  1110  and  1120 . All told, in the scenario above, 50 spreads could have traded at three different price levels  342  and  344  (see columns  1110  and  1120 ). 
       FIG. 11  depicts what the ‘Traded Spread Display’ window would look like based on the above scenario. It should be reiterated that the price displayed in column  1110  is not the price of any individual product in the market, but is instead the spread price (Bid price of Contract A—Bid price of Contract B, or Ask price of Contract A—Ask price of Contract B). In addition, the quantities that are displayed in column  1120  for the present innovation are not quantities that currently reside in the market, nor are they the quantities of any specific product; rather they constitute a measure of how many spreads have traded at that particular price level throughout the day. Lastly, the information in this window is limited by how long the trader has the application open, since, in the preferred embodiment, there is no database currently attached to the window that will store previous trade information. However, the addition of such a database is within the skill of the art. 
     The calculations and other operations described herein may be implemented using a spreadsheet mode and/or by any standard rule based logic or other convenient logic for determining the appropriate display numbers and indicators. Thus, a spread trading tool has been described according to the present invention. Many modifications and variations may be made to the techniques and structures described and illustrated herein without departing from the spirit and scope of the invention. Accordingly, it should be understood that the methods and interfaces described herein are illustrative only and are not limiting upon the scope of the invention.