A system and method for identifying a candidate set of at least one buy order associated with an investment account, determining a back out target value that identifies a fiscal amount by which the candidate set must to be reduced, and progressively decrementing a respective initial asset quantity of one or more buy orders of the candidate set until the back out target value is achieved at a final asset quantity of the one or more buy orders. The candidate set of buy orders can then be modified by replacing the respective initial asset quantity with the respective final asset quantity for at least one of the one or more buy orders. The modified candidate set of buy orders can then be provided for trade execution.