1. An automated trading system for use in an electronic exchange system network, comprising: a receiver interface that receives market price information for a first traded item from an exchange; a transaction value calculator that generates a transaction value for the first traded item based on price information for a second traded item related to the first traded item; decision logic using at least a portion of the received market price information and the transaction value to generate a decision whether to submit a response to buy or sell the first traded item; and an output interface for outputting a request for market transaction for one of the first traded item and the second traded item for transmission to the exchange in response to said decision logic.