Changing indicator colours as part of NT Strategy

[dgregor5]

Hi
How does one change the indicator line (e.g. EMA) colour if part of an NT strategy?

thx
David

[NinjaTrader_Ray]

You can do something like:

protected override void Initialize()
{
    Add(SMA(20));
    SMA(20).Plots[0].Pen.Color = Color.Red;
    CalculateOnBarClose = true;
}

[dgregor5]

thx - this works a treat.........
next step, how does one change the colours of both the two lines & histogram for the MACD.

thx
David

[NinjaTrader_Ray]

The concept is that the Plots[] and Lines[] are arrays holding plot and line objects. If you have a two line plot, you can change the color by accessing either Plots[0] for the first plot, Plots[1] for the second plot and so on...

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

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

Review my sample code to get an idea of how you could replicate this for the MACD indicator.

[dgregor5]

great - easy to code; work a treat. thx for your help !
David

[dgregor5]

OK - hopefully final question on this thread. I am now struggling to change the thickness of the MACD histogram! How can I resolve this one. thx !!!!
David

[NinjaTrader_Dierk]

On the indicator properties: Right click->Indicators

[dgregor5]

thx. but would like to integrate into the coded strategy....pls refer to earlier notes on this. thx. David

[NinjaTrader_Ray]

Try:

SMA(20).Plots[0].Pen.Width = 2;

[dgregor5]

thx Ray ! it works

[higler]

I am having a problem controlling the Plot Color. I have an indicator that has one plot that was generated by the wizard:

Add(new Plot(Color.FromKnownColor(KnownColor.Blue), PlotStyle.Bar, "ChangeFromOpen"));

I am assuming that this is stored in Plots[0].

The indicator works until I add the following code to the OnBarUpdate method to try and manipulate the color of the plot (the code was copied directly from the help example):

if (Values[0] > 100)
Plots[0].Pen = new Pen(Color.Blue);
else
Plots[0].Pen = new Pen(Color.Red);

I get the compiler error: Operator '>' cannot be applied to operands of type 'NinjaTrader.Data.DataSeries' and 'int'

If I try and compare it to 100.0 then I get the same error message except 'double' instead of 'int'

Any help would be greatly appreciated.

[NinjaTrader_Ray]

Values[0] returns a DataSeries at that index. To get the value of try something like:

Values[0][0]

Also, no need to create a new Pen object. Best to avoid creating new objects if you do not have to.

Plots[0].Pen.Color = Color.Red;
'
will work for example.

[higler]

Thanks. That works.

[higler]

If I have an indicator with three plots, is there a way to programmatically turn off/on the price markers for the individual plots? Thanks.

[NinjaTrader_Ray]

Unfortunately this can only be programatically controlled at the indicator level for all price markers, not individually.