An electronic exchange computing system is provided that includes a computer storage system, at least one transceiver, and a processing system. The storage system stores an electronic order book. The transceiver receives data transaction requests and transmits messages of an electronic data feed. The processing system determines that a first order has priority and generates a new order ID for the first order. The first order is maintained in the electronic order book (e.g., with a quantity of 0). Additional order instructions are received from a client computer system and are associated with the first order. A match is found based on the additional order instructions. A data feed update message is generated and transmitted as part of a real-time data feed and includes the newly generated order ID for the first order.