Patent ID: 8027908

Claim:
A system for chart based order entry, the system comprising: a trading station adapted to receive market data corresponding to a tradeable object, wherein the trading station is further adapted to display historical market data corresponding to the tradeable object on a chart, the historical market data being mapped to a plurality of values along a value axis, wherein the trading station is further adapted to display a movable order entry interface, wherein the order entry interface comprises a plurality of price objects corresponding to a plurality of price levels, wherein the order entry interface is displayed in relation to a cursor of a user input device, wherein the cursor is at a location in relation to the chart, wherein the location changes as the cursor is moved in response to input from a user, wherein the trading station is further adapted to track the cursor, wherein the tracking comprises moving the order entry interface in relation to the cursor when the cursor moves to a new location in relation to the chart, wherein the trading station is further adapted to dynamically determine the plurality of price levels based on the new location of the cursor, wherein the trading station is further adapted to freeze the plurality of price levels upon detecting a first user input, wherein the freezing comprises stopping dynamically determining of the plurality of price levels based on the location of the cursor, wherein the trading station is further adapted to select one of the frozen plurality of price levels based on a second user input, wherein the trading station is further adapted to send a trade order to buy or sell the tradeable object to an electronic matching engine, wherein the trade order is based on the selected price level.