1. A method, comprising: receiving, by a processing device in a market for a particular instrument, trading orders from a plurality of traders via a plurality of workstations that are associated with the plurality of traders, each trading order having an associated price, and the plurality of workstations being 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; 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; receiving, by the processing device, from a particular trader via a workstation associated with the particular trader a subsequent trading order having an original price that would trade with the price of the particular trading order; 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: communicating, by the processing device, an alert message regarding the subsequent trading order to the particular trader via the workstation associated with the particular trader in response to receiving the subsequent trading order having the original price that would trade with the price of the particular trading order; and preventing, by the processing device, the subsequent trading order from trading with the particular trading order at least until a response to the alert message is received from the particular trader; wherein the particular trading order is a particular sell order having an associated offer price; wherein receiving from the particular trader the subsequent trading order having the original price that would trade with the price of the particular trading order comprises receiving from the particular trader a subsequent buy order having an original bid price greater than or equal to the offer price of the particular sell order; wherein communicating the alert message regarding the subsequent trading order to the particular trader comprises communicating an alert message regarding the subsequent buy order to the particular trader; wherein the original bid price of the subsequent buy order includes a whole number component and a fractional number component; and wherein the method further comprises the generating, by the processing device, the alert message regarding the subsequent buy order, including: determining a proposed modified bid price for the subsequent buy order by modifying the whole number component of the original bid price; and generating an alert message indicating the proposed modified bid price for the subsequent buy order and requesting the particular trader to accept or decline the proposed modified bid price.