Point type to Bars/Price converter?

[FREEN]

Probably asked before but can´t find it:

Is there a NinjaScript method or other easy solution for converting the .NET Point type to X/Y (Bars/Price) coordinates and vice versa?

[NinjaTrader_Jesse]

Hello,

Thank you for the question.

There are easy methods for this hidden in the ChartControl.

For X coordinates by bar number, you can use:

ChartControl.GetXByBarIdx(BarsArray[0], 100)

or for TIme:

ChartControl.GetXByTime(Time[0]);

for Y:

ChartControl.GetYByValue(this, 2000);

Depending on where these are used, ChartControl can be null so a null check is always recommended as well:

if(ChartControl != null)
{
//do stuff
}

I look forward to being of further assistance.

[FREEN]

Thanks for revealing unsupported methods Jesse!

So the null check is for checking for a chart instance, right?

No "visible" chart == null ?

//Fredrik

[NinjaTrader_Jesse]

Hello,

Correct, a Situation you often run into ChartControl being null would be in an indicator that is in the Market Analyzer. There is no chart so any ChartControl calls would be null.

I look forward to being of further assistance.

[mballagan]

How do we convert back from the .NET x,y coordinates to NinjaTrader barnumber/price?


So we might have something like

double x = ChartControl.GetXByBarIdx(BarsArray[0], barnumber);
double y = ChartControl.GetYByValue(this, pricevalue);

//do some calculations using x,y and get updated values x1,y1

//we then want

int barnumber = GetBarNumber(x1);
double priceval = GetPrice(y1);

This is just dummy code but how would GetBarNumber(), GetPrice() be implemented?

[NinjaTrader_Jesse]

Hello,

Thank you for the question.

For NT7 I would have no suggestion here as there are no exposed methods for this that I could relay. Going forward in NT8 the ChartControl and other chart-related coordinate methods have all been exposed so you can translate back and forth between coordinate and price/time.

If any other NT7 users have custom solutions for this question an answer would be welcome for any undocumented/unsupported solutions.

I look forward to being of further assistance.