At a first time, an indication of a selection of a contract, expiring at a second time and associated with a commodity, is received. A set of physical stacks associated with the contract is accessed. Based upon the first time, the second time, and a periodic sampling rate, a marginal cost profile for the commodity is generated. The marginal cost profile is a set of values relating to an estimate of a marginal cost of production for the commodity at a set of times between the first time and the second time. A display signal, adapted to form the basis for a visual display, is generated. The display signal includes a first component relating to at least one physical stack from the set of physical stacks, and a second component relating to the marginal cost profile. The display signal is stored in a memory and transmitted from the memory.