MultiColor Plot Issue

[spinalwiz]

Hi,

I've been having some issues with this in Beta 5 and was wondering if its just me being an idiot:

Initialize

Add(new Plot());

OnBarUpdate

Values[0].Set(0);

if(Close[0] < SMA(75)[0])
PlotColors[0][0] = Color.Green;


The plot should be coloured green at anypoint where the close was < SMA(75). This doesnt seem to be the case?

[NinjaTrader_Ray]

No, that is not what will happen. Your code I believe will change the entire plot to green when the condition is true.

To do what you wish, please see the reference sample contained in the following thread.

http://www.ninjatrader-support2.com/vb/showthread.php?t=21225

[eDanny]

I believe the whole purpose of this change is to be able to change the plot color at any time and it would only affect the line segment it is applied to. That means the above code should work. Of course there should be an 'else' in there for a false condition and color change? Otherwise there would be no change from the old 6.5 method.

[spinalwiz]

So got it working by putting a 'default' case in:


Values[0].Set(0);

PlotColors[0][0] = Color.Orange;

if(Close[0] < SMA(75)[0])
PlotColors[0][0] = Color.Green;


Probably just me but this wasnt at all obvious to me. If you dont have the additional line in there it behaves kind of strange where the plot changes colour when you scroll left and right.

Guess its all part of using a beta pre-documentation

[spinalwiz]

FYI, even if you set a default plot colour in initialize it still doesn't work unless you set PlotColors on every OnBarUpdate. E.g. the following doesn't work:

Initialize
Add(new Plot(Color.Orange, "plot1"));


OnBarUpdate
Values[0].Set(0);

If(Close[0] < SMA(75)[0]) {
PlotColors[0][0] = Color.Green;

[NinjaTrader_Ray]

Please see the link I provided, it contains a reference sample that demonstrates how to have a multi-color plot.

[rt-trader]

This may have been reported elsewhere - but just in case.

It seems that PlotColors[0][0] = Color.Empty is not recognised although Color.Transparent is...

Also - a question - is there a .GetPlotColor or similiar that can be used in conjuction with PlotColors so if a Plot color is changed via Parameters the coloring code logic within an indicator can respond accordingly?

Thanks

[NinjaTrader_JoshP]

rt_trader,

Color.Empty is the default value of PlotColors when you don't explicitly set it. That is why if you try to set it to Color.Empty it will still give you the Parameter set color.

There is no .GetPlotColor, but you can print PlotColors to get the color if you set it. If you get a Color [Empty] that means you are using the Parameter color, otherwise it will print whatever you set it to.