RSI of non builtin study?

[legend]

Is it possible to create an efs for an RSI of a custom indicator rather than just an RSI of a builtin study?

I have written the following script to show a 10 period RSI of the StandardDeviation function. However, I get the following error message: RSIStudy parameter 2 invalid.

I've attached StandardDeviation.efs, though this appears to be called in without problem.

Any help would be greatly appreciated.

Many thanks.

function preMain() {

setStudyTitle("Comp");
setDefaultBarFgColor(Color.yellow)
setCursorLabelName("Comp");
addBand(70, PS_SOLID, 2, Color.red, "Upper");
addBand(30, PS_SOLID, 2, Color.red, "Lower");
}

function main(nCompLength,sdStudy) {

var sdStudy = callFunction("/Library/StandardDeviation.efs", "main", 10, "Close");
var Comp = null;

if (nCompLength == null) nCompLength = 10;
if (sdStudy == null) return;
if (Comp == null) Comp = new RSIStudy(nCompLength, sdStudy);

return Comp.getValue(RSIStudy.RSI);
}

[ACM]

legend
At this time builtin studies cannot use custom variables. You will need to write your own RSI study
Alex

[legend]

Thanks Alex, I've worked it out.