OnRender - Custom rendering of main price chart from separate indicator ?

[firstlanetech]

I have an indicator which is displayed separately below the main price panel. I am trying to perform custom rendering of the main chart panel from the indicator OnRender() event. However, it does not seem to be working.

Here is the sample code. I am trying the draw a blue rectangle over the main chart window (cc.ChartPanels[0]).

protected override void OnRender(ChartControl cc, ChartScale cs)
{
            base.OnRender(cc, cs);
            using (SharpDX.Direct2D1.SolidColorBrush dxBrush = new SharpDX.Direct2D1.SolidColorBrush(RenderTarget, SharpDX.Color.Blue))
            {
                RenderTarget.FillRectangle(new SharpDX.RectangleF(cc.ChartPanels[0].X, cc.ChartPanels[0].Y, cc.ChartPanels[0].W, cc.ChartPanels[0].H), dxBrush);
            }
}
​

I am able to render the blue rectangle in indicator panel if I replace cc.ChartPanels[0] with ChartPanel. So the code is correct for indicator panel, but idoes not work for the main price panel.

Is rendering allowed only in the indicator window panel (separate panel in this case) ?

Any ideas why it does not work ?

[NinjaTrader_ChelseaB]

Hello firstlanetech,

Indicators are only supported to render in the panel they are added to.

We recommend adding an instance of the indicator to each panel you would like the indicator to render in.