efsinternal crashes esignal

[biswar]

hi

spent hours on this,

i am trying to get a ema of avalue, i have passed it to a function via efsinternal and esignal crashes, if i remove this line all works fine
xStudy2 = efsInternal("fEVAL",blarb1);

Cheers

Bob

[eSignal_JasonK]

Hello Bob,

The problem that your are experiencing is related to the parameter value, blarb1, that you're passing to efsInternal(). This value is changing on every bar. Each time efsInternal() is called for xStudy2 with a different number, a new xStudy2 object gets created. This process you're creating would be similar to creating a 1000 ema studies, each with a different length parameter. This is a memory killer as you have experienced.

The solution is to use efsExternal() from a new EFS. This is the only way to turn the blarb1 calculation into a series than can then be passed to the ema() function.

The first thing you need to do is remove all the logic where you were trying to calculate the emaval series in your original formula. Take emaval out of the return statement in main() as well. Also, the return elements that you have concatenated the +"" to prevent them from plotting needs to be removed. These returns will need to be in the form of a number and not a string.

Now create a new formula that calls your original through efsExternal(). This allows you to use the 3rd series from that formula as the source for emaval. Your new formula can use the same preMain() code. It will also need the formula parameter logic from the original as these parameters will need to be passed to the efsExternal() call. Place your new formula in the same folder as your original. Here's a code example of what the new formula could look like. You can add back the +"" to the series that you don't want to plot from this formula if you want.

/****************
Description : This Indicator plots CMO (Chande Momentum Oscillator)
Provided By : Developed by TS Support, LLC for eSignal. (c) Copyright 2002
****************/
var fpArray = new Array();
var xStudy2 = null;

function preMain(){
    setComputeOnClose(true);
    setStudyTitle("SEB LinRegSlope momentum2");
    setCursorLabelName("Slope", 0);
    setCursorLabelName("ZeroLine", 1);
    setDefaultBarFgColor(Color.red, 0);
    setDefaultBarFgColor(Color.cyan, 1);
    setDefaultBarFgColor(Color.blue, 2);
    setDefaultBarFgColor(Color.lime, 3);
    setDefaultBarFgColor(Color.green, 4);
    setPlotType(PLOTTYPE_HISTOGRAM, 2);
    var x=0;
    fpArray[x] = new FunctionParameter("oscval", FunctionParameter.STRING);
    with(fpArray[x++]){
        setDefault(3);
    }
    
}

function main(Length, oscval) {
    if (Length == null) Length = 21;
    
    if (xStudy2 == null) {
        xStudy2 = efsExternal("seb_linregslope[momentum].efs", Length, oscval);
    }
    
    var nRet1 = getSeries(xStudy2, 0);
    var nRet3 = getSeries(xStudy2, 2);
    var nRet4 = getSeries(xStudy2, 3);
    
    var emaval= ema(9, nRet3, 0);

    
    return new Array(nRet1, 0, nRet3, nRet4, emaval);
} 

[biswar]

nice one that did the trick
thanks jason


Bob

[eSignal_JasonK]

You're most welcome.