MWD XAverage

MWDXAverage.efs                                                                                               EFSLibrary - Discussion Board

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 09/26/2008Notes: 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;
}