Patent ID: 7720742

Claim:
A computer readable medium containing a set of computer readable instructions that when executed cause a computing device of a user to: display a graphical user interface, the interface comprising: a single-screen simultaneous display of non-overlapping screen components comprising: (a) a display of the user's current position in at least one financial instrument, (b) a display of an open order list of the user, (c) a display of one or more areas to enter trades, and (d) a display of offers to buy and offers to sell at least one financial instrument, wherein the display of offers to buy and sell at least one financial instrument comprises: a first display area of sizes for a plurality of buy offers for a financial instrument selected by the user; a second display area of sizes for a plurality of sell offers for the financial instrument selected by the user; and a third display area showing a single list of price levels that correspond to prices for the buy offers in the first display area and the sell offers in the second display area; and receive trade orders entered into the one or more areas to enter trades, wherein the set of computer readable instructions when executed supporting a connection between the computing device and at least one database, said connection enabling real-time updating of information presented in the screen components using one or more processors of the computing device, and displaying and updating the information presented in the-screen components.