changing color of a plot

[kjackson]

I have code that does the following:

Add(new Plot(new Pen(Color.FromKnownColor(KnownColor.MediumSlateBlu e), 3), "FirstPlot"));
Add(new Plot(new Pen(Color.FromKnownColor(KnownColor.HotPink), 3), "SecondPlot"));

This appears to work fine, the lines being drawn are the correct color.

Later in my code I add:

Plots[0].Pen.Color = Color.Gray;
Plots[1].Pen.Color = Color.Gray;

However, the colors don't change. Is what I'm doing incorrect?

Thanks in advance

[NinjaTrader_JoshP]

Changing plot colors directly is supported in NT7. For 6.5, please see this reference sample: http://www.ninjatrader-support2.com/...ead.php?t=3227

[shodson]

When to use Plot() vs OnBarUpdate()

I can't find any documentation on the Plot() method, yet I see it is used by some indicators that I have. When should I use this vs. OnBarUpdate()? When does Plot() get fired in the chain of events that NT handles?

[NinjaTrader_Bertrand]

I'm not sure I follow, Plots is just a plot object collection defining how the visualization is done - http://www.ninjatrader-support.com/H...eV6/Plots.html

http://www.ninjatrader-support.com/HelpGuideV6/Plot.html

[shodson]

No, the Plot() method, like this

public override void Plot(Graphics graphics, Rectangle bounds, double min, double max) 

Some indicators I run across implement this method, overriding the Plot() method in the Indicator class. My question is how/when would I override this method as opposed to performing drawing logic on OnBarUpdate()? When does this method get called by NT? Every tick? Every bar close?

[NinjaTrader_JoshP]

shodson,

The Plot() method is not supported. It is called any time the chart would paint (i.e. indicator value updates the plot). People use it to draw things themselves or plot in different methods than what is provided by default.