Standard Deviation for Volume Issues

[EC_Chris]

Hello, I'm trying to create a standard deviation for volume and running into issues.Essentially this should be like a Bollinger Band code, but it isn't working.

here is the code from the indicator:

		else if (State == State.DataLoaded)
			{
	
				stdDev	= StdDev(Period);
				
			}
		}

		protected override void OnBarUpdate()
		{
			double stdDev0	= stdDev[0];
			
			if (State == State.Historical)
			{
				Value[0] = Volume[0];	
				Upper[0] = Value[0] + NumStdDev * stdDev0;

			}
			else
			{		
				Value[0] = Bars.TickCount;
				Upper[0] = Value[0] + NumStdDev * stdDev0;

			}

NumStdDev = 2;
Period= 20;

Attached is an image of the indicator. Even if I put Period at some really high number, it doesn't change the indicator. It looks like "Upper[0]" is just plotting "Value[0]", Upper is the white line on top of the blue bars. Essentially I should be getting a relatively straight line across like the yellow one I have drawn in.

Any idea why this code isn't working?

Thanks

[NinjaTrader_AlanP]

Hello EC_Chris,

Thank you for your note.

I would suggest adding prints to your script.

It could be that “NumStdDev * stdDev0” comes out to be a tiny number, and thus adding it to Value[0], makes it difficult to see this component of this.

Prints might look like,

Print(NumStdDev*ToString()+”___>”+stdDev0.ToString());

I’ve provided a link to a youtube video which covers an example of using prints to understand behavior:

https://www.youtube.com/watch?v=K8v_2ONBbqI&feature=youtu.be&t=48m45s

Please let us know if you need further assistance.

[EC_Chris]

Thanks Alan, but I actually was able to resolve it right after I posted. Sorry about that. Appreciate your response.