Custom / Spread Overlays

[TURLIES]

Hi,

I've tried to use the Symbol Overlay efs with a combined custom symbol (C + AXP + JPM), and the results are not being produced on a similar scaling to the symbol its being overlaid on - as it normally does.

Any ideas?

Thanks,
Paul

[eSignal_JasonK]

Hello Paul,

The problem has to do with the order of math operations within the variable vSym. The call to close(0, 1, vSym) where vSym is equal to a string that looks like "0.8038C + AXP + JPM" is only applying the adjustment multiplier to C and not AXP or JPM. Your solution is to change vSym to just be "C + AXP + JPM" and then adjust the result of close(0, 1, vSym) after it returns the value of the spread (see lines 63 and 70).

do30-fin-overlay2.efs

var vLoaded = false;

function preMain() {
    if (vLoaded == false) {
        setPriceStudy(true);
        setDefaultBarThickness(2);
        setDefaultBarFgColor(Color.RGB(254,197,24));

    } else {
        setCursorLabelName(vSymbol);
        setStudyTitle("FIN");
    }
}

var vSymbol = "";
var vSym = "";
var vInterval = 0;
var str = new String();
    
function main(nSymbol, nFactor){
    if (vLoaded == false) {
    
        if (nSymbol == null) 
            nSymbol = "C + AXP + JPM";
        
        vInterval = getInterval();    
        if (nFactor == null) {
            var c = close();
            if (c == null) {
                return;
            }
            var c1 = close(0, 1, nSymbol);
            if (c1 == null) {
                return;
            }
            nFactor = (c/c1);
            nFactor *= 10000
            nFactor = Math.round(nFactor);
            nFactor /= 10000
            str = nFactor;
        } else {
            var vFactor = nFactor+'';
            var strLength = vFactor.length
            var de = false;
            for (i = 0; i < strLength; ++i) {
                str += vFactor.charAt(i)
                if (vFactor.charAt(i) == ".") {
                    de = true;
                }
            }
            if (de == false) {
                str += ".0"
            }
        }
        //vSym = (str + nSymbol + "," + vInterval);     // line 63
        vSym = (nSymbol + "," + vInterval);
        vLoaded = true;
        vSymbol = (str + " x FIN");
        preMain();
    }
    
    var v = close(0, 1, vSym) * eval(str);              // line 70
    if (v == null) {
        return;
    }

    return v;
} 

[TURLIES]

Hi Jason,
Thanks for your help on this study, and also the Price Tick Change Study - much appreciated.

Paul