Abstract: An electronic trading system utilizes a Match Engine that receives orders, stores them internally, calculates tradable combinations and advertises the availability of real and implied orders in the form of market data. New tradable items defined as combinations of other tradable items may be included in the calculation of tradable combinations. A technique is disclosed for transforming a combination or strategy contract with an arbitrary number of buy and sell legs with an arbitrary volume ratio for each leg into a form that can be used for rapid implied order calculations.

Abstract: An electronic trading system utilizes a Match Engine that receives orders, stores them internally, calculates tradeable combinations and advertises the availability of real and implied orders in the form of market data. Calculating tradeable combinations or cycles for certain strategies becomes complex. Strategies that utilize legs having different volume ratios may form tradeable combinations that will traverse a trigger order more than one time.

Abstract: A computer implemented method for determining implied orders in an electronic trading system is provided. The method comprises receiving a first set of one or more real orders, wherein the orders are not tradable against each other. One or more implied orders are identified within the first set of real orders. Market data corresponding to the implied orders can also be identified. At least one additional order is received and the tradability of the additional order is determined against the real or implied orders within the first set of real orders. A resting set of orders is determined from those real and implied orders within the first set of orders not affected by the tradability of the additional order. Implied orders are determined from within the set of resting orders.