Custom price channel indicator will not plot

[Lawnboy]

I created a simple price channel indicator and when I change the MAX/MIN bars ago parameter from [0] to [1], the indicator will not plot on a chart. Why?

Here is the relevent portion of the script:


protectedoverridevoid Initialize()
{
Add(new Plot(Color.FromKnownColor(KnownColor.Orange), PlotStyle.Line, "Upper"));
Add(new Plot(Color.FromKnownColor(KnownColor.Orange), PlotStyle.Line, "Lower"));
CalculateOnBarClose = true;
Overlay = true;
PriceTypeSupported = false;
}
///<summary>
/// Called on each bar update event (incoming tick)
///</summary>
protectedoverridevoid OnBarUpdate()
{
// Use this method for calculating your indicator values. Assign a value to each
// plot below by replacing 'Close[0]' with your own formula.
Upper.Set(MAX(High,Period)[1]);
Lower.Set(MIN(Low,Period)[1]);
}




Thanks!

[eDanny]

Try adding if(CurrentBar < 1)return; at the beginning of OnBarUpdate() section.

You are try to access one bar back at the beginning of the chart on the first bar.

[NinjaTrader_Bertrand]

Lawnboy, welcome to our forums - you likely run into this issue here -

http://www.ninjatrader-support2.com/vb/showthread.php?t=3170

[Lawnboy]

Thanks guys. That did it.