A system for facilitating order entry includes a first computer system having one or more computers. The first computer system generates a display of at least one side of a market comprising two sides. The displayed side of the market includes one or more offers from one or more market participants. Each offer includes an offered price and an offered quantity. The display indicates offered quantities available at various offered prices. The first computer system accesses a quantity specified by a user, calculates an average price at which the specified quantity is available based on the one or more offers, and indicates the calculated average price within the display. The first computer system receives an instruction from the user to generate one or more orders for the specified quantity at the calculated average price for communication to a second computer system having one or more computers supporting the market for matching with one or more corresponding offers. In response to receiving the instruction from the user, the first computer system generates one or more orders for the specified quantity at the calculated average price and communicates the generated orders to the second computer system for matching with one or more corresponding offers.