Only Discussion .. How fast an Order can flip from != null to == null about ninjatrader8 HOT 2 CLOSED

Yep design the code flow and calls so that it doesnt bump into that issue at that time.
No need to make orders null until new ones are sent for example and swap to prior
or put them in a structure for each trade etc so you can refer back and forth to each trade op --

Dictionary of Proposed Trade as structure to include a generic structure
class TradeOperationGeneric
{
IEnumerable OrdersEntry
IEnumerable OrdersExitStopsLoss
IEnumerable OrderExitsTargets

bool IsOrderEntryAnyActive
bool IsOrderExitsStopLossAnyActive
bool IsOrderExitsTargetAnyActive
bool IsOrdersActve
}
or
3)
class TradeOperation
{
Order OrderEntry1
Order OrderEntryOcoLong
Order OrderEntryOcoShort

Order OrderStoploss1
Order OrderStoploss2
Order OrderStoploss3
Order OrderStoploss4

Order OrderTarget1
Order OrderTarget2
Order OrderTarget3
Order OrderTarget4
}

from ninjatrader8.

will close this to allow focus on the core as that is design caveat of the derived system not an engine issue

from ninjatrader8.