MWD XAverage

[eSignal]

File Name: MWDXAverage.efs

Description:
MWD XAverage indicator

Formula Parameters:
Moving average source: close
Smoothing factor: 0.2


Notes:
MWD Xaverage an exponential moving average indicator which uses
a [0,1] smoothing factor. The moving average length is calculated
from the smoothing factor according to formula:
LENGTH = 2/FAC - 1;


Download File:
MWDXAverage.efs



EFS Code:

/*********************************

Provided By:  

    eSignal (Copyright c eSignal), a division of Interactive Data 
    Corporation. 2008. All rights reserved. This sample eSignal 
    Formula Script (EFS) is for educational purposes only and may be 
    modified and saved under a new file name.  eSignal is not responsible
    for the functionality once modified.  eSignal reserves the right 
    to modify and overwrite this EFS file with each new release.

Description:        

    MWD XAverage indicator.    

Version:            1.0  09/26/2008

Notes:

    MWD Xaverage an exponential moving average indicator which uses
    a [0,1] smoothing factor. The moving average length is calculated
    from the smoothing factor according to formula: 
    LENGTH = 2/FAC - 1;

Formula Parameters:                     Default:

    Moving average source               close
    Smoothing factor                    0.2
    
**********************************/

var fpArray = new Array();

function preMain() {
    setPriceStudy(true);
    setStudyTitle("MWDXaverage");
    setCursorLabelName("MWXAvg", 0);  
    
    var x=0;
    fpArray[x] = new FunctionParameter("MASource", FunctionParameter.STRING);
    with(fpArray[x++]) {
        setName("Source of moving average");
        addOption("open"); 
        addOption("high");
        addOption("low");
        addOption("close");
        addOption("hl2");
        addOption("hlc3");
        addOption("ohlc4"); 
        setDefault("close"); 
    }    

    fpArray[x] = new FunctionParameter("nFAC", FunctionParameter.NUMBER);
    with(fpArray[x++]) {
        setName("Factor");
        setLowerLimit(0.01);  
        setDefault(0.2);
    }
}

var xPrice = null;
var xMWDX = null;
var bInit = false;

function main(MASource, nFAC) {

    var nBarState = getBarState();
    var nBarCount = getCurrentBarCount();

    if(nBarState == BARSTATE_ALLBARS) {
        if (MASource == null) MASource = "close";
        if (nFAC == null) nFAC = 0.2;
    }  

    if(bInit == false) {
        xPrice = eval(MASource)();
        xMWDX = ema(Math.round(2/nFAC-1), xPrice);
        bInit = true;
    }

    var nValue1 = xMWDX.getValue(0);
    return nValue1;
}