chart is stuck on "Loading Data..."

[waynecd]

Any help is appreciated.

When I run the following code the chart stays on "Loading Data..." forever. It does not affect any other operation and I can even delete the study from the chart when it is in this state.

I would like to use the close(0) of a 1 min chart (symbol $ADD) when it is above or below a 21 ema for 1 min chart of $ADD to color the background of a 55T chart of the "ES #F".

Attached is a picture of the chart and the code sample follows:

var bInit = false; 

function preMain() {
    setPriceStudy(true);
}

var vLastAlert = -1;
var myStudy0 = null;
var Type0 = "ema";
var Length0 = 21;
var Source0 = "close";
var Offset = 0;
var vSymbol = "$ADD";
var Interval0 = 1;

function main(){

    if ( bInit == false ) { 
        
        if(vSymbol == null) vSymbol = getSymbol();
        if(Interval0 == null) Interval0 = getInterval();
        var xSymbol = vSymbol+","+Interval0;

        if(myStudy0 == null) myStudy0 = offsetSeries(eval(Type0)(Length0,eval(Source0)(sym(xSymbol))),Offset);
        bInit = true; 
    } 
    var CloseVal = close(0,sym(xSymbol));

    if (CloseVal > myStudy0.getValue(0)){
            setBarBgColor(Color.RGB(255,255,192));
    } else if (CloseVal < myStudy0.getValue(0)){
            setBarBgColor(Color.RGB(255,234,255));
    }

    return getSeries(myStudy0).toFixed(2);
} 

[ACM]

Re: chart is stuck on "Loading Data..."

waynecd
The reason the script is stuck on "Loading data..." is because you are not passing a valid symbol to the close(0,sym(xSymbol)) call
To verify that add a debug statement in the line above that call and you will see that xSymbol will return the symbol/interval once on the first iteration of the efs and then will return undefined on the subsequent iteration.
This is because you declared xSymbol as a local variable inside the bInit routine which means that xSymbol will be declared and assigned a valid symbol on the first iteration. On the following iteration the bInit routine is not executed hence the variable xSymbol does not get declared.
To resolve this you need to declare xSymbol as a global variable
Alex

Originally posted by waynecd
Any help is appreciated.

When I run the following code the chart stays on "Loading Data..." forever. It does not affect any other operation and I can even delete the study from the chart when it is in this state.

I would like to use the close(0) of a 1 min chart (symbol $ADD) when it is above or below a 21 ema for 1 min chart of $ADD to color the background of a 55T chart of the "ES #F".

Attached is a picture of the chart and the code sample follows:

var bInit = false; 

function preMain() {
    setPriceStudy(true);
}

var vLastAlert = -1;
var myStudy0 = null;
var Type0 = "ema";
var Length0 = 21;
var Source0 = "close";
var Offset = 0;
var vSymbol = "$ADD";
var Interval0 = 1;

function main(){

    if ( bInit == false ) { 
        
        if(vSymbol == null) vSymbol = getSymbol();
        if(Interval0 == null) Interval0 = getInterval();
        var xSymbol = vSymbol+","+Interval0;

        if(myStudy0 == null) myStudy0 = offsetSeries(eval(Type0)(Length0,eval(Source0)(sym(xSymbol))),Offset);
        bInit = true; 
    } 
    var CloseVal = close(0,sym(xSymbol));

    if (CloseVal > myStudy0.getValue(0)){
            setBarBgColor(Color.RGB(255,255,192));
    } else if (CloseVal < myStudy0.getValue(0)){
            setBarBgColor(Color.RGB(255,234,255));
    }

    return getSeries(myStudy0).toFixed(2);
} 

[waynecd]

Alex, thanks again,

I'm starting to understand efs cycling, which should decrease my coding errors significantly.

As always, your help is invaluable.

[ACM]

waynecd
You are most welcome
Alex

Originally posted by waynecd
Alex, thanks again,

I'm starting to understand efs cycling, which should decrease my coding errors significantly.

As always, your help is invaluable.