Draw.Line requires NinjaScriptBase. What objects implement that?

[gripload]

Hello,

I'm simply trying to draw a line. I'm doing so from within a custom class I've created, so obviously that class doesn't implement NinjaScriptBase, and passing in "this" doesn't work. I've been unable to find a suitable object I can pass in that does.

Draw.Line(NinjaScriptBase owner, string tag, int startBarsAgo, double startY, int endBarsAgo, double endY, Brush brush)

Thank you,

Ryan

[NinjaTrader_JessicaP]

Hello gripload, and thank you for your question. You will need a handle to the Indicator you intend to use to draw the line on a chart. In a pinch, you can include

[FONT=Courier New]using NinjaTrader.NinjaScript.Indicators;[/FONT]

and then call

[FONT=Courier New]Indicator example = new SMA();[/FONT]

to create a suitable object.

Please note that generally speaking, you need an indicator or strategy, attached to a chart, with an active window handle. As such, any context in which an indicator's "this" method is not accessible is likely a context where you will run into errors. Indicators need to be initialized in real time and have state driven logic.

With this in mind, I would highly encourage you to create a "helper" indicator that your code which does not implement NinjaScript base in turn calls, and to let it handle drawing lines on itself.

If you would prefer avoiding NinjaScript entirely, NinjaTrader uses the WPF, and there is more information regarding using this to draw lines at this publicly available MSDN link.

https://msdn.microsoft.com/en-us/library/ms747393.aspx