Unmanaged OCO part-fill handling by NinjaTrader broker

[volIQ]

In the case of an unmanaged system, using OCO pairing, for example if the system issues a Long entry Limit and Long entry Stop Market order pair with matching OCO, what happens if one or the other order get Part-Filled?

Does the unhit order:

a) get cancelled automatically
b) quantity get reduced automatically by the fill amount of the part-filled order
c) nothing until the other order is State.Fillled

Thanks for the clarification.

[NinjaTrader_ChelseaB]

Hello volIQ,

This would depend on the brokerage, but typically the quantity of the remaining orders in the OCO group will be automatically reduced.

[volIQ]

Can you confirm that the NinjaTrader Brokerage actually does the quantity reduction on part-fills within the group in the case of the same direction entry (and for exit) group of orders.

If so, it will save me writing a lot of order /position management code in the OnExecutionUpdate method. Thanks in advance.

[NinjaTrader_ChelseaB]

Hello volIQ,

From my understanding of reviewing other forum threads, NinjaTrader Brokerage does not adjust the quantity of remaining orders in OCO and this has to be adjusted by the code.
However, it may be a good idea to give this a test to confirm.