Patent ID: 11961140
Assignee: CHICAGO MERCANTILE EXCHANGE INC.
Field: IT methods for management (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. The computerized trading system of claim 14, wherein the instructions further comprise instructions for:
receiving at the server via the network, from a party trading on the computerized trading system, an electronic request for cancelling a trading order previously submitted to the server;
determining a value of a cancellation flag of the previously submitted trading order in the order book database;
when the value of the cancellation flag of the previously submitted trading order is non-cancellable, denying the electronic request for cancelling the trading order;
when the value of the cancellation flag of the previously submitted trading order is cancellable:
determining a status of the previously submitted trading order;
when the status of the previously submitted trading order is available, cancelling the previously submitted trading order;
when the status of the previously submitted trading order is engaged:
determining an engagement interrupt probability parameter value which, based on a probability function, randomly may or may not exceed a threshold engagement interrupt probability value;
upon determining that the engagement interrupt probability parameter value is greater than the threshold engagement interrupt probability value:
cancelling engagement of the previously submitted trading order; and

upon determining that the engagement interrupt probability parameter value is less than a threshold engagement interrupt probability value:
denying the electronic request for cancelling the trading order; and
updating the value of the cancellation flag of the previously submitted trading order to non-cancellable in the order book database.