Patent ID: 7835979

Claim:
A method, comprising: in a market for an instrument, receiving, by a processing device, trading orders from a plurality of traders via respective workstations that are associated with the plurality of traders, wherein each trading order has an associated price, and wherein the workstations are coupled to the processing device via a communications network; placing, by the processing device, each of the received trading orders on a trading exchange such that the trading orders may be executed, including placing each of the received trading orders in one of a plurality of trading order stacks; determining, by the processing device, that the price of a particular trading order differs from at least one comparison price by more than a threshold value; and based at least in part on determining that the price of the particular trading order differs from the at least one comparison price by more than the threshold value, at least temporarily preventing by the processing device, within an electronic display of the particular trading order's respective trading order stack, a promotion of the particular trading order within its respective trading order stack, wherein preventing the promotion of the particular trading order includes leaving, within the electronic display of the particular trading order's respective trading order stack, at least one space between the particular trading order and a top of its respective trading order stack.