Patent ID: 7580883

Claim:
A method for chart based order entry, comprising: receiving via a computing device market data corresponding to a tradeable object; displaying via the computing device 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; displaying via the computing device 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; tracking via the computing device 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; dynamically determining via the computing device the plurality of price levels based on the new location of the cursor; freezing 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; selecting via the computing device one of the frozen plurality of price levels based on a second user input; and sending via the computing device 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.