Dynamic Plot Color

[SystemTrading]

I've followed the example in the help document and I'm having some trouble. I am using the follow code.

 
protected override void Initialize()
{
Add(new Plot(Color.DarkGray,PlotStyle.Bar,"myplot");
}
 
protected override void OnBarUpdate()
{
if (x && y && z)
Plots[0].Pen= new Pen(Color.Yellow);
 
if (!x && !y && !z)
Plots[0].Pen= new Pen(Color.Blue);
}

For some reason ALL bars on the chart are colored dark gray. Occasionally as I scroll through the chart ALL bars will change yellow or blue, but I am trying to color individual bars as they happen. Am I doing something wrong?

[NinjaTrader_Ray]

Yes, you are changing the color of the entire plot (all histogram bars) not just single ones. To do what you want, add X number of plots where X is the number of different colors used. If you want to show color A, set the value only for plot A, if you want to show color b, set the value only for plot B.

Check out the system indicator source code VolumeUpDown for an example of this.

[SystemTrading]

Thanks Ray!