Event Driven programming

["CJS"]

If I asign an entry order to an IOrder Object in the OnBarUpdate()?, Is necessary (a must) to call later at the OnOrderUpdate() to reset the entry order to null?

Thanks.

[NinjaTrader_Bertrand]

Correct, CJS you want to nullify the IOrder in order to submit another order then, otherwise your order submission would get 'stuck' as the IOrder was in a so called terminal state (rejected, cancelled, filled).

["CJS"]

But, if the entry order has been filled, Is necessary (a must) to call later at the OnExecution() to reset the entry order to null? Or the entry order can be reset to null (if filled) within the OnOrderUpdate() ?

[NinjaTrader_Bertrand]

CJS, if it got cancelled and is not partfilled > reset it in OnOrderUpdate() - else reset it in OnExecution() - http://www.ninjatrader.com/support/f...ead.php?t=7499

["CJS"]

Is there any difference about Internal Order Hadling rules whether I work with normal order or if I use objects IOrder?

[NinjaTrader_Bertrand]

No, the IOrders would just offer you more control.