Referencing MAEnvelope indicator

[wcmaria]

I am trying to code an indicator that will draw a dot on the screen below a candle when the lowerband of the MAEnvelope crosses above the EMA line.

This is my code:

protected override void Initialize()
{
Add(new Plot(Color.FromKnownColor(KnownColor.Orange), PlotStyle.Line, "Plot0"));
CalculateOnBarClose = true;
Overlay = true;
PriceTypeSupported = false;
}

/// <summary>
/// Called on each bar update event (incoming tick)
/// </summary>
protected override void OnBarUpdate()
{
if (CurrentBar < 1)
return;

if (CrossAbove(MAEnvelope(0.5,25).LowerBand, EMA(145), 1))
DrawDot(CurrentBar.ToString(), true, 0, Low[0] - TickSize, Color.Red);
}


But it does not work. Am I referencing the MAEnvelope lowerband correctly?

[NinjaTrader_JoshP]

What your code says is when the lowerband crosses above the EMA, draw a dot. Is that what you are after? I suggest you print values of both the MAEnvelope and your EMA to see what they are evaluated as. Then you can run comparisons by hand and know what your code is doing.

[wcmaria]

Yes that is correct. I would like the dot to plot when the lowerband crosses above the ema.

[NinjaTrader_JoshP]

I suggest you add Print()s so you can see what those values are evaluated as. Only then will you be able to find areas where the dot should have occurred.

[wcmaria]

I tried adding the following line

Print((MAEnvelope(0.5,25).LowerBand[0]));

But it did not send anything to the output window.

[NinjaTrader_JoshP]

Please check your Control Center logs for errors.

[wcmaria]

Interesting, I forgot to look there too for errors.

I get the following error

Error on calling the 'OnBarUpdate' method for indicator 'AA_USTLong' on bar 1: Unable to cast object of type 'NinjaTrader.Indicator.DataSeriesHelper' to type 'NinjaTrader.Data.Bars'.

Will

[NinjaTrader_JoshP]

You will need to debug this to find which line is in question here. Please use try-catch blocks to try and isolate this. http://www.ninjatrader-support2.com/...ead.php?t=9825