Patent ID: 8630934

Claim:
A computer system for monitoring matching of orders to buy or sell securities between participants, the matching of orders being communicated in trade messages that relate to securities trading, the trade messages comprising trade parameter data, the computer system comprising: a hardware interface for receiving trade messages, a computer-implemented extractor arranged to communicate with the interface to receive a trade message, and then extract a trade parameter value based on the trade parameter data of the trade message, a number of multiple memories that are each computer-readable and computer-writeable, a computer-implemented write unit arranged to communicate with the memories and the computer-implemented extractor for cyclically and sequentially addressing the memories one memory at a time for accumulating trade parameter values extracted during a start time and a stop time for each memory, a computer-implemented read unit arranged to communicate with the memories for reading accumulated trade parameter values from the memories, and a computer-implemented determiner arranged to communicate with the read unit for determining a recent trade parameter by utilizing the accumulated trade parameter value(s) read from the memories, wherein the computer system is arranged to decrease risk exposure to price changes of one or more securities being traded by at least one of the participants based on the recent trade parameter.