Adding a print statement gives different results.

[moldham]

Hi,

When I add a print statement to my strategy I get different backtest results. The log shows the error "Error on calling the 'OnExecution' method for strategy 'BBSqueezeV4ShortFriday': Object reference not set to an instance of an object."
Without the print statement I don't get this error and I don't understand why.
The print statement in question is at line 137 and prints the "stopOrder" (Print("stopOrder = " + stopOrder.ToString()).
Can you help?

The parameters I'm using are a 60min chart of EURUSD currency from 01/01/2009 to present day. All other settings are default. I'm using version 6.5.1000.14

Thanks,

Mark

[NinjaTrader_Ben]

Hello,

I have not looked at your code yet, but is there a chance that the stoporder object does not exist at some point and that is the error? What is in stoporder that you are printing?

Please post code snippets so we can help easier. Thanks!

[moldham]

Hi Ben,
I've pasted the code that's giving me problems below. The print statement is in bold. I don't understand why the print statement should affect the stoporder object?

Thanks

protected override void OnExecution(IExecution execution)
{
/* We advise monitoring OnExecution to trigger submission of stop/target orders instead of OnOrderUpdate() since OnExecution() is called after OnOrderUpdate()
which ensures your strategy has received the execution which is used for internal signal tracking. */
if (entryOrder != null && entryOrder.Token == execution.Order.Token)
{
if (execution.Order.OrderState == OrderState.Filled || execution.Order.OrderState == OrderState.PartFilled || (execution.Order.OrderState == OrderState.Cancelled && execution.Order.Filled > 0)&& BarsInProgress == 1)
{
Print("execution.Order.OrderState = " + execution.Order.OrderState.ToString());

// Stop-Loss order
stopOrder = ExitShortStop(0, true, execution.Order.Filled, execution.Order.AvgFillPrice + (target+1*TickSize), "MyStop", "BracketEntry");

Print("stopOrder = " + stopOrder.ToString());


// Target order
targetOrder = ExitShortLimit(0, true, execution.Order.Filled, execution.Order.AvgFillPrice - target, "MyTarget", "BracketEntry");

Print("targetOrder = " + targetOrder.ToString());


// Resets the entryOrder object to null after the order has been filled or partially filled
if (execution.Order.OrderState != OrderState.PartFilled)
{
entryOrder = null;

}
}

}

[NinjaTrader_Ben]

Hello,

Try doing a check before hand and see if that helps:
if (stopOrder != null && stopOrder.Token == order.Token)
{ ...etc.

http://www.ninjatrader-support.com/HelpGuideV6/IOrder.html