Patent ID: 7716119

Claim:
A computer readable medium comprising instructions that, when executed, cause a computer system connected to a data communication network to: (a) permit a user to select a trade-desired object and input an initial trade condition for selling or purchasing the selected object in the computer system, the initial trade condition including a price for selling or purchasing and a trade-desired quantity; (b) receive a user-inputted automatic trade condition for determining purchase and selling conditions, the automatic trade condition comprising information for deciding a selling price, a selling quantity, a purchase price and a purchase quantity for subsequent orders: (c) permit the user to place an initial trade order according to the initial trade condition through the data communication network: (d) immediately after the initial trade order has been contracted and without further intervention by the user, generate and place an automatic purchase order and an automatic selling order for trade according to the automatic trade condition: (e) immediately after one of the automatic selling order and the automatic purchase order is contracted, without further intervention by the user generate and place a subsequent automatic purchase order and a subsequent automatic selling order for trade according to the automatic trade condition by the computer system: and (f) repeat the process (e): wherein the selling order in each of the processes (d) and (e) is higher than the previously contracted price in each of the processes (d) and (e), and the purchase order price in each of the processes (d) and (e) is lower than the previously contracted price in each of the processes (d) and (e).