Make Charts Pretty!

May 10th, 2012, 03:38 AM

josh

Is there a way to build a line on close chart in NT with the area under the line shaded, particularly shaded with a gradient? See the attached picture for an idea of what I'm trying to do.

You need to code a little indicator, which shades the area. You can use the NinjaScript method DrawRegion() to do that.

May 10th, 2012, 03:43 AM

Fat Tails

You need to code a little indicator, which shades the area. You can use the NinjaScript method DrawRegion() to do that.

@Fat Tails

What do you use for the lower boundary?

I can shade between two ema's without a problem so I attempted to use EMA(1) for the upper series and "0" for the lower series but could not get it to work. Also tried CurrentDayOHL().CurrentLow[0] as the lower series, no luck.

Any suggestions would be appreciated.

Thanks!

May 10th, 2012, 05:27 AM

Code

        protected override void Initialize()
        {
            Add(new Plot(Color.FromKnownColor(KnownColor.Transparent), PlotStyle.Line, "Plot0"));
            Add(new Plot(Color.FromKnownColor(KnownColor.Transparent), PlotStyle.Line, "Plot1"));
			
            Overlay				= true;
        }

        protected override void OnBarUpdate()
        {
     
			
			Plot0.Set(Close[0]);
			Plot1.Set(ChartControl.CanvasBottom);
			DrawRegion("myRegion", CurrentBar, 0, Plot0, Plot1, Color.Blue, Color.Blue, 5);
        }

May 10th, 2012, 05:41 AM

Mindset

Code

        protected override void Initialize()
        {
            Add(new Plot(Color.FromKnownColor(KnownColor.Transparent), PlotStyle.Line, "Plot0"));
            Add(new Plot(Color.FromKnownColor(KnownColor.Transparent), PlotStyle.Line, "Plot1"));
			
            Overlay				= true;
        }

        protected override void OnBarUpdate()
        {
     
			
			Plot0.Set(Close[0]);
			Plot1.Set(ChartControl.CanvasBottom);
			DrawRegion("myRegion", CurrentBar, 0, Plot0, Plot1, Color.Blue, Color.Blue, 5);
        }

@Mindset

Thanks!

I wasn't familiar with (ChartControl.CanvasBottom). (See... I told ya'll I wasn't a programmer... )

Is there documentation on ChartControl variables?

May 10th, 2012, 05:49 AM

@Mindset: This can be done in a simpler way.

Code

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

        protected override void OnBarUpdate()
        {
		Values[0].Set(Close[0]);
		DrawRegion("myRegion", CurrentBar, 0, Values[0], 0, Color.Blue, Color.Blue, 5);
        }

May 10th, 2012, 06:03 AM

Is there documentation on ChartControl variables?

No - NT refuse to provide any documentation on their code variables that would be useful.

Fat Tails

Neat - but your method entails another data series and I thought that would be less resource efficient - or am I incorrect in that assumption?

May 10th, 2012, 06:05 AM

Mindset and Fat Tails, thank you for your help. However, is there a way to make this shaded area a gradient color?

May 10th, 2012, 06:13 AM

I find it almost unfathomable that this isn't a built-in function?

May 10th, 2012, 06:42 AM

Mindset

Is there documentation on ChartControl variables?

No - NT refuse to provide any documentation on their code variables that would be useful.

Fat Tails

Neat - but your method entails another data series and I thought that would be less resource efficient - or am I incorrect in that assumption?

@Mindset:

No, my method uses a single plot, yours two. Value.Set() or Values[0].Set() is just the correct way setting the values for that single plot.

I bet you introduced additional variables Plot0 and Plot1. My code does not use any variables or properties.

May 10th, 2012, 08:55 AM

josh

Mindset and Fat Tails, thank you for your help. However, is there a way to make this shaded area a gradient color?

@josh

Here is the single color version. A gradient version will require assistance from the guru's.

You have an option to draw a line on close as well as dot on close.

You have an option to show price bars along with the colored line on close/dot on close, or hide the bars or show just the line or dot.

Make Charts Pretty!

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Make Charts Pretty!