How do you apply indicators to indicators?

[asherisaac]

I set up a ratio, which is basically RATIO = Symbol1 = Symbol2.
I now want to apply a Bollinger Band to that ratio (which is plotted in an indicator panel).

any code examples on how to do this?

tia, asher.

[asherisaac]

sorry, i meant RATIO = SYMBOL1 / SYMBOL2.

[ACM]

asherisaac
Click here and download BBof_template.efs.
You can use this as a base to create the study you want
Alex

[asherisaac]

alex...i'm not quite seeing how to apply the problem in my code. here are some lines of code...i just need to draw a bollinger band or apply a moving around to the RATIO value, which gets plotted in the indicator window.


function preMain() {

setStudyTitle("AID_PAIR_TRADER");
setCursorLabelName("UPPER", 1);
setCursorLabelName("AID_PAIR_TRADER");
setCursorLabelName("AID_PAIR_TRADER");

}



function main(s1, s2) {

var BOLLY = new BollingerStudy(40, "Close", 2);
var UPPER = BOLLY.getValue(BollingerStudy.UPPER);
var LOWER = BOLLY.getValue(BollingerStudy.LOWER);
var BASIS = BOLLY.getValue(BollingerStudy.BASIS);
var Sym1 = getValue("Open", 0, 1, s1);
var Sym2 = getValue("Open", 0, 1, s2);
var RATIO = Sym1 / Sym2;


if ((UPPER == null) || (LOWER == null) || (BASIS == null)) {

return; }


if (s1 == null) {

s1 = "SPY";

}

if (s2 == null) {

s2 = "QQQ";

}





return(RATIO);

}

[ACM]

asherisaac
You cannot use a builtin study with a symbol other than the one being charted in the price window. If you are charting the ratio SPY /QQQ in the main window as your price series then all you need to do is set the bultin Bollinger study to plot as an indicator (ie setPriceStudy(false);) othewise you need to create your own Bollinger study which is where BBof_template.efs will be of use.
Alex

[asherisaac]

alex, how would i chart the ratio of SPY/QQQ in the main window?
right now i've successfully charted SPY/QQQ in an indicator panel...there's no way to just apply a bollinger band or moving average to this plot in the indicator panel?

[ACM]

asherisaac

how would i chart the ratio of SPY/QQQ in the main window?

As you would with a regular symbol ie type SPY / QQQ (note that there must be a space before the operator sign).

there's no way to just apply a bollinger band or moving average to this plot in the indicator panel?

Not with the builtin Bollinger Band or Moving Average studies
Alex

[asherisaac]

thanks, alex.
if i have the main window set to SPY / QQQ, and an EFS script running off it generating trade signals, how can i tell optionsxpress to simultaneously buy SPY and sell QQQ or vice versa? (pairs trading). is anybody doing pairs trading successfully with esignal?