Drawing a smooth band

[pman777]

Hello, to draw a band off of the EMA, I am using the "DrawRegion" command. For example, I will draw 10 ticks above and 10 ticks below the EMA, creating the band. This works ok but I would like for the outer edges of my band to be smooth. Using the DrawRegion command causes the edges to be jagged. Is there a way I can achieve this?

thanks

[NinjaTrader_Matthew]

So I can get a better idea, can you provide a screen shot of the 'jagged' edges?

Is this a multi-series script or single series?

[pman777]

Drawing a smooth band

Sure, see attached. Not sure what you mean by 'series' ... sorry.

[koganam]

Sure, see attached. Not sure what you mean by 'series' ... sorry.

That looks like you have a separate DrawRegion() for each bar. If you want a smooth curve, you will have to draw the region from start to finish as one region, not a series of regions that are pairwise abutting each other.

[pman777]

thank you for your feedback. I understand what you are saying but being sort of new to ninjascrpt, I'm not sure how to modify my code to get the desired result. Below are my DrawRegion statements, which are executed OnBarUpdate. The upper and lower boundaries are calculated from the center EMA for that given bar. Can you suggest any modifications? thanks in advance.

DrawRegion("tag1" + CurrentBar , 0, 1, EMA(myEMA), (EMA(myEMA)[0] + (myBand * TickSize)) , Color.Transparent, trendColorUp, 3);

DrawRegion("tag2" + CurrentBar , 0, 1, EMA(myEMA), (EMA(myEMA)[0] - (myBand * TickSize)) , Color.Transparent, trendColorUp, 3);

[koganam]

thank you for your feedback. I understand what you are saying but being sort of new to ninjascrpt, I'm not sure how to modify my code to get the desired result. Below are my DrawRegion statements, which are executed OnBarUpdate. The upper and lower boundaries are calculated from the center EMA for that given bar. Can you suggest any modifications? thanks in advance.

DrawRegion("tag1" + CurrentBar , 0, 1, EMA(myEMA), (EMA(myEMA)[0] + (myBand * TickSize)) , Color.Transparent, trendColorUp, 3);

DrawRegion("tag2" + CurrentBar , 0, 1, EMA(myEMA), (EMA(myEMA)[0] - (myBand * TickSize)) , Color.Transparent, trendColorUp, 3);

Turn your upper and lower edges into Plots, then use DrawRegion() to color between them, using a single fixed tag, ending at the CurrentBar, and starting from however far back you want to start.

 
Plot1.Set(EMA(myEMA)[0] + (myBand * TickSize));
Plot2.Set(EMA(myEMA)[0] - (myBand * TickSize));
 
DrawRegion("RegionTag", CurrentBar, 0, Plot1, Plot2, Color.Empty, trendColorUp, 3);

You might prefer to use DataSeries instead of Plots, as the DataSeries will not be shown in the config GUI, whereas Plots will be by default.

[pman777]

thank you!!!

[pman777]

Ok ... I was able to get the band to be smooth! However, I'm having one issue regarding the color of the band. If the EMA is rising, I want the band color to be green; conversely when the EMA is falling, I want the band color to be red. Below is my code. Currently it only paints the band one color regardless of the direction of the EMA. What am I doing wrong?

thanks again!

Plot0.Set(EMA(myEMA)[0] + (myBand * TickSize));
Plot1.Set(EMA(myEMA)[0] - (myBand * TickSize));

if (Rising(EMA(myEMA))) DrawRegion("RegionTag", CurrentBar, 0, Plot0, Plot1, Color.Empty, trendColorUp, 3);
else DrawRegion("RegionTag", CurrentBar, 0, Plot0, Plot1, Color.Empty, trendColorDn, 3);

[NinjaTrader_Joydeep]

Hello pman777,
If you try the below code then are you able to get the correct color.

if (CurrentBar < 1 ) return;
Plot0.Set(EMA(myEMA)[0] + (myBand * TickSize));
Plot1.Set(EMA(myEMA)[0] - (myBand * TickSize));

if (Rising(EMA(myEMA))) DrawRegion("RegionTag" + CurrentBar, 0, 1, Plot0, Plot1, Color.Empty, Color.Blue, 3);
else DrawRegion("RegionTag" + CurrentBar, 0, 1, Plot0, Plot1, Color.Empty, Color.Red, 3);

[koganam]

Ok ... I was able to get the band to be smooth! However, I'm having one issue regarding the color of the band. If the EMA is rising, I want the band color to be green; conversely when the EMA is falling, I want the band color to be red. Below is my code. Currently it only paints the band one color regardless of the direction of the EMA. What am I doing wrong?

thanks again!

Plot0.Set(EMA(myEMA)[0] + (myBand * TickSize));
Plot1.Set(EMA(myEMA)[0] - (myBand * TickSize));

if (Rising(EMA(myEMA))) DrawRegion("RegionTag", CurrentBar, 0, Plot0, Plot1, Color.Empty, trendColorUp, 3);
else DrawRegion("RegionTag", CurrentBar, 0, Plot0, Plot1, Color.Empty, trendColorDn, 3);

I cannot see anything wrong with your syntax. Are you sure that after editing your code, you compiled the indicator and reloaded the chart?

[koganam]

Hello pman777,
If you try the below code then are you able to get the correct color.

if (CurrentBar < 1 ) return;
Plot0.Set(EMA(myEMA)[0] + (myBand * TickSize));
Plot1.Set(EMA(myEMA)[0] - (myBand * TickSize));
 
if (Rising(EMA(myEMA))) DrawRegion("RegionTag" + CurrentBar, 0, 1, Plot0, Plot1, Color.Empty, Color.Blue, 3);
else DrawRegion("RegionTag" + CurrentBar, 0, 1, Plot0, Plot1, Color.Empty, Color.Red, 3);

Your code takes him back to creating a jagged region, which was the problem that he initially wanted to solve.