Abstract: A system for distributing data describing trading activity occurring on a plurality of different Electronic Communications Networks (ECNs), each of which receives buy and sell orders from stock traders and each of which performs equity sales transactions based on the received orders. Live data fed from each ECN describing pending buy and sell orders and executed transactions on each exchange are reformatted into standard form and aggregated to create, update and maintain consolidated trading data that is stored in a database. In response to one or more request specifications received from a remotely located user, the system extracts and processes selected portions of the consolidated data to produce response data returned to the requestor.