Very slow drawing object properties edition on indicator

[alejandrozuleta]

Recently I migrated a custom indicator from NT7 to NT8. The indicator draws dots above or below the bars of a chart based on some conditions. If I add a chart with a huge amount of data many dots are drawn, so far so good, the problem comes when I add a new drawing object, a text for example, and I try to change its properties, color, font, size, etc. The properties window is very slow in show up and the application of changes to the properties takes too long, which doesnt happens in NT7.

I am suspecting all the drawning objects (the dots drawn by the indicator and the drawining objects added manually) are loaded in the properties window of every object. You can check this in the attached image to this post, where there are a lot of objects with the tags HighPlot and LowPlot.

How can I avoid this performance issue?

[NinjaTrader_BrandonH]

Hello alejandrozuleta,

Thanks for your post.

You could consider using SharpDX to draw Ellipses instead of creating numerous Drawing Objects.

See the attached example scripts demonstrating using OnRender to draw objects and drawing objects with text.

Also, see the SampleCustomRender indicator that comes default with NinjaTrader for an example of drawing an ellipse using SharpDX. To view the code of the script, open a New > NinjaScript Editor window, open the Indicators folder, and select the SampleCustomRender file.

And, review the help guide documentation below for more information.

Using SharpDX for Custom Rendering: https://ninjatrader.com/support/help..._rendering.htm
RenderTarget: https://ninjatrader.com/support/help...ndertarget.htm
DrawEllipse(): https://ninjatrader.com/support/help...rawellipse.htm

Let us know if we may assist further.