When the order is finalized and in the state of no further processing

[ManTrader]

How can I detect that an order is in its final state, I mean the state where it will never get changed after that.
I need to make sure that I don't miss any state, so would you check the following snippet and let me know is it comprehensive.

private bool IsOrderFinalized(Order order)
{
var state = order.OrderState;
return state == OrderState.Filled || state == OrderState.Cancelled || state == OrderState.Rejected || state == OrderState.Unknown; // I think Unknown means an error occur perhaps during submission
}

[NinjaTrader_ChelseaB]

Hello ManTrader,

Welcome to the NinjaTrader forums!

Yes, checking the OrderState is Filled, Cancelled, or Rejected in OnOrderUpdate() would be correct.

Are you finding that this is not behaving as you are expecting?

https://ninjatrader.com/support/helpGuides/nt8/en-us/order.htm

[ManTrader]

Oh, I have found IsTerminalState static member do exactly same. Thank you for the link.