Bollinger Bands of Standard Deviation

[mike_scott]

I wish to plot the standard deviation of price with bollinger band of the standard deviation above and below the standard deviation line. I am very simply using two external efs studies in the simple script below.
What I am confused about is that the bollinger study returns three parameters. This formula works but how to I get all three of the bollinger parameters to draw seperate lines?

Mike Scott, Tarzana, CA

function preMain() {
setStudyTitle("BB of Std Deviation");
setCursorLabelName("StdDev", 0);
setCursorLabelName("BBofStd", 1);
setDefaultBarFgColor(Color.blue, 0);
setDefaultBarFgColor(Color.red, 1);
}

function main() {

var Std = efsExternal("/Downloads/StandardDeviation.efs");
var BBStd = efsExternal("/Bollinger/BollingerBands.efs");

return new Array (Std,BBStd);
}

[waynecd]

Hi Mike,

Try:

function preMain() {

setStudyTitle("BB of Std Deviation");
setCursorLabelName("StdDev", 0);
setCursorLabelName("BBofStd", 1);
setDefaultBarFgColor(Color.blue, 0);
setDefaultBarFgColor(Color.red, 1);
}

function main() {

    var Std = efsExternal("/Downloads/StandardDeviation.efs");
    var BBStd = efsExternal("/Bollinger/BollingerBands.efs");
    var BBU = getSeries(BBStd, 0);
    var BBM = getSeries(BBStd, 1);
    var BBL = getSeries(BBStd, 2);

    return new Array (Std,BBU,BBM,BBL);
} 

Note: Std scale is much different than that of BBSTD so Std plots at the bottom nearly flat and BBStd plot at the top compressed.

Wayne