Patent ID: 8370251

Claim:
A method including: determining by a host exchange a first time based on a first travel time and a first receipt time, wherein the first travel time is a travel time from a first network device to the host exchange, wherein the first receipt time is a time a first transaction message is received by the host exchange, wherein the first transaction message is received by the first network device from a first client device before being received by the host exchange, wherein the first time is an approximation of the time at which the first network device sent the first transaction message; determining by the host exchange a second time based on a second travel time and a second receipt time, wherein the second travel time is a travel time from a second network device to the host exchange, wherein the second receipt time is a time a second transaction message is received by the host exchange, wherein the second transaction message is received by the second network device from a second client device before being received by the host exchange, wherein the second time is an approximation of the time at which the second network device sent the second transaction message; and prioritizing by the host exchange the first transaction message and the second transaction message based on the first time and the second time.