Urgent Please

[kouider]

I tried and I cant put Bollinger bands on Forceindex.efs studies...
Some one can help me to do that?.
And I whant to put Bollinger Bands on other studies ...

in advance thanks a lot

best regards

Kouider

Attachment: forceindex.efs

/************************************************** *****************
Description : This Indicator plots Force Index indicator
Provided By : Developed by TS Support, LLC for eSignal. (c) Copyright 2002
************************************************** ******************/

function preMain()
{
setStudyTitle("Force Index");
setCursorLabelName("FastAvg", 0);
setCursorLabelName("SlowAvg", 1);
setCursorLabelName("Zero", 2);
setDefaultBarFgColor(Color.blue, 0);
setDefaultBarFgColor(Color.red, 1);
setDefaultBarFgColor(Color.green, 2);
setPlotType(PLOTTYPE_HISTOGRAM, 0);
}
var XA1_1 = 0.0;
var XA2_1 = 0.0;
function main(XLen1, XLen2)
{
if (XLen1 == null) XLen1 = 3;
if (XLen2 == null) XLen2 = 13;
var Volume = getValue("Volume", 0);
var Close = getValue("Close", 0, -2);
var FrceIdx = Volume * (Close[0] - Close[1]);
var Factor1 = 2 / (XLen1 + 1);
var Factor2 = 2 / (XLen2 + 1);
var XA1 = Factor1 * FrceIdx + (1 - Factor1) * XA1_1;
var XA2 = Factor2 * FrceIdx + (1 - Factor2) * XA2_1;
if (getBarState() == BARSTATE_NEWBAR)
{
XA1_1 = XA1;
XA2_1 = XA2;
}
return new Array(XA1, XA2, 0);
}