Are there validity constraints possible for OCO orders?

OCO (One Cancels Other) orders are a specific type of order that allows traders to place two orders at once where if one order is executed, the other is automatically canceled. The nature of OCO orders means that they inherently have built-in conditions that dictate their execution based on market movements.

The correct understanding of OCO orders is that they operate under the premise that the trader has set specific conditions that automatically manage the interaction between the two orders. This characteristic limits the applicability of additional validity constraints to those already established within the order itself. As such, OCO orders usually do not incorporate further constraints beyond the basic conditionality of one order voiding the other upon execution.

Therefore, since OCO orders are designed primarily to manage specific executable conditions and do not allow for further complexity, the assertion that no additional constraints can be applied aligns with the fundamental functionality of OCO orders in trading platforms.