Adding Draw.Region to Darvas Indicator

[aligator]

Dear Support,

I have a modified version of default Darvas indicator for sharing here. But I have a minor issue before posting it.

I am using a bool = false condition for painting the region gradient color. The indicator plots fine when the bool is set to false. However, when bool condition is set to true the indicator does not plot. The following is the logic.

            if (paintRegion)
            {
                LinearGradientBrush gradient = new LinearGradientBrush();
                gradient.StartPoint = new Point( 0, 0 );
                gradient.EndPoint = new Point( 1, 0 );

                gradient.GradientStops.Add(new GradientStop(System.Windows.Media.Colors.Crimson, 0));    //Color for Bottom side of the candle
                gradient.GradientStops.Add(new GradientStop(System.Windows.Media.Colors.DarkCyan, 1));    //Color for Top side of the candle            

                Draw.Region(this, "Region1", CurrentBar, 0, boxTopSeries, boxBottomSeries, Brushes.Transparent, gradient, Zopacity,0);

                gradient.Freeze();                
            }

Any idea why the bool condition = true prevents the indicator from plotting. Does the gradient brush need serialization similar to regular custom brushes? I have not serialized the gradient brush.

Many Thanks.

[NinjaTrader_ChelseaB]

Hello aligator,

Improper serialization would cause a public variable to not be saved in Xml such as workspaces or templates.

Are you certain that the code is being reached?
(Have you added a print?)

Does the other Draw.Region() outside of this condition also use Brushes.Transparent?

[aligator]

Hello aligator,

Improper serialization would cause a public variable to not be saved in Xml such as workspaces or templates.

Are you certain that the code is being reached?
(Have you added a print?)

Does the other Draw.Region() outside of this condition also use Brushes.Transparent?

Thanks Chelsea,

Not quite sure what to print. The code works fine when the bool paintRegion = false. When set to true nothing plots.

No, I Brushes.Transparent is not used out side this condition. Here is the file if you care please.

Many thanks.

[NinjaTrader_ChelseaB]

Hello aligator,

You could Print(Time[0]); to see on which bars the condition is true.

Below is a link to a forum post that demonstrates how to use prints to understand behavior.
https://ninjatrader.com/support/foru...121#post791121

When the bool is false, no region is drawn but the Upper and Lower plots are appearing.
When the bool is true, the Upper and Lower plots do not appear, is this correct?

Is there an error appearing on the Log tab of the Control Center when the script is reloaded?

[aligator]

Hello aligator,

You could Print(Time[0]); to see on which bars the condition is true.

Below is a link to a forum post that demonstrates how to use prints to understand behavior.
https://ninjatrader.com/support/foru...121#post791121

When the bool is false, no region is drawn but the Upper and Lower plots are appearing.
When the bool is true, the plots do not appear, is this correct?

Is there an error appearing on the Log tab of the Control Center when the script is reloaded?

Thanks you Chelsea,

I was using the wrong ISeries for the region. The correct ISeries are Upper and Lower as shown below, not boxTopSeries and boxBottomSeries in post#1.

Draw.Region(this, "Region", CurrentBar, 0, Upper, Lower, Brushes.Transparent, gradient, Zopacity,0);

This works fine now but I do not get a gradient effect between the lower and upper bands. I want an effect similar to gradient bars where the region color is Crimson at the bottom and gradually changes to DarkCyan at the top. Thanks.

[NinjaTrader_ChelseaB]

Hello aligator,

From my understanding the gradient WPF brush is not converted to a SharpDX gradient brush in the drawing tool code.

You would need to make your own drawing tool script and create a SharpDX gradient.

https://ninjatrader.com/support/helpGuides/nt8/sharpdx_direct2d1_lineargradientbrush.htm