Indicator values in strategy

[debarr76]

Hello, I'm trying to access my custom indicator's value like below. It only works when I call through a new instance but throws an exception when calling through a variable:

Strategy 'MyCustomStrategy': Error on calling 'OnBarUpdate' method on bar 16269: You are accessing an index with a value that is invalid since it is out-of-range. I.E. accessing a series [barsAgo] with a value of 5 when there are only 4 bars on the chart.

public class MyCustomStrategy : Strategy
{

		private MG_BollingerBounce bbIndy;
		

		protected override void OnStateChange()
		{
			if (State == State.SetDefaults)
			{
				... etc ...
			}
			else if (State == State.Configure)
			{
				bbIndy = new MG_BollingerBounce();	
			}
		}

		protected override void OnBarUpdate()
		{
			
			if(MG_BollingerBounce()[0] == 1) { ... works .... }
 
                        if(indy[0] == 1) { ... throws exception ... }

                }

[NinjaTrader_Jesse]

Hello,

Thank you for the question.

This would be because you are creating a new instance in this case.

The new keyword would not be needed for an indicator in NinjaTrader. If you think of a indicator being a Method rather than a type, it is easier to see the structure of how indicators work.

you would only need to remove the new keyword, additionally I would suggest putting the indicator in DataLoaded or Historical rather than Configure.

else if (State == State.Historical)
{
	bbIndy = MG_BollingerBounce();	
}

I look forward to being of further assistance.

[koganam]

if(indy[0] == 1) { ... throws exception ... }

What object is indy?

[debarr76]

Sorry, that's the bbIndy variable, I misspelled when posting. Jesse's advice helped me get it working.