Strategy Terminates on startup

[mmartin68]

Hi,

in ninja 7 I was able to add indicators to the strategy, but if I add an indicator my strategy gets terminated without an error message, compile gives no errors as soon as I remove the lines strategy is loading again.
m_VWAP is created and now exception is thrown.

Regards
Martin

else if (State == State.DataLoaded)
{
this.m_VWAP = mmVWAPS(_std, bSoundOn, pSoundVWAP, m_cntPullback, m_VWAPDelta, m_PeriodType, m_VTF, true);
AddChartIndicator(this.m_VWAP);

}

[NinjaTrader_ChelseaB]

Hello mmartin68,

Is there an error appearing on the Log tab of the Control Center?

What is the full error message?

[QuantKey_Bruce]

Perhaps the indicator is trying to load an additional data series, and you didn't add it in the strategy in State.Configure.

[mmartin68]

Hi,

thank you for you quick response.

yes I get an error message but I can not figure out which object is not referenced:

03/14/23 12:33 PM

Default

Indicator 'mmVWAPS': Error on calling 'OnStateChange' method: Object reference not set to an instance of an object.

The problem is solved when I include the OnStateChange inside a try catch.Even and I moved the creation of additional Series to the DataLoaded state instead of the Configure state.

Thank you very much.


Why has my strategy no performance data, if I start an ATM with StartAtmStrategy(m_curATMStrategy, entryOrder); after the Order is created. Is it because the ChartTrader manage the order?

Is there a way to adjust the limit order of my ATM Strategy so get the Order handle?

Regards
Martin

[NinjaTrader_ChelseaB]

Hello Martin,

A try catch does not fix the problem, it simply prevents the script from disabling when there is an error.

I would recommend finding the line of code causing the error, and removing the call to the variable with a null value.

https://ninjatrader.com/support/forum/forum/ninjatrader-8/strategy-development/1107472-entryorder-null-error#post1107522

AddDataSeries() can only be called in State.Configure. You cannot call this in State.DataLoaded.

https://ninjatrader.com/support/helpGuides/nt8/addheikenashi.htm

Atm Strategy methods do not affect the strategy position or order method overrides. These are like manually submitted orders that do not affect the strategy.

https://ninjatrader.com/support/helpGuides/nt8/using_atm_strategies.htm

[QuantKey_Bruce]

Clearly, in your OnStateChange you are referencing some object that is null. You need to figure out why your OnStateChange is throwing that exception not just put it in a try catch which is simply masking the problem. Comment out your OnStateChange sections and put them back a line at a time until you isolate what is happening there.