High - EMA – EFS

High_ema.efs EFSLibrary - Discussion Board

File Name: High_ema.efs

Description:
High - EMA indicator.

Formula Parameters:
Length: 13
Price Data To Use: Close

Notes:
This indicator plots the difference between the High (of the previous period)
and an exponential moving average (13 period) of the Close (of the previous period).

Download File:
High_ema.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: High - EMAVersion: 1.0 09/23/2008Notes: 
This indicator plots the difference between the High (of the previous period)
and an exponential moving average (13 period) of the Close (of the previous period). 
Formula Parameters: Default: Length 13 Price Data To Use Close**********************************/

var fpArray = new Array();
var bInit = false;

function preMain() {
  setStudyTitle("High - EMA");
  setCursorLabelName("High - EMA", 0);
  setDefaultBarFgColor(Color.blue, 0);
  setPlotType(PLOTTYPE_LINE, 0);
  setDefaultBarThickness(1, 0);
  addBand(0, PS_SOLID, 1, Color.black);
  var x = 0;
  fpArray[x] = new FunctionParameter("Length", FunctionParameter.NUMBER);
  with (fpArray[x++]) {
    setLowerLimit(1);
    setDefault(13);
  }
  fpArray[x] = new FunctionParameter("Price", FunctionParameter.STRING);
  with (fpArray[x++]) {
    setName("Price Data To Use");
    addOption("open");
    addOption("high");
    addOption("low");
    addOption("close");
    addOption("hl2");
    addOption("hlc3");
    addOption("ohlc4");
    setDefault("close");
  }
}
var xEMA = null;
var xMyPrice = null;
var xHigh_EMA = null;

function main(Length, Price) {
  var nHigh_EMA = 0;
  if (Length == null) Length = 13;
  if (Price == null) Price = "close";
  if (bInit == false) {
    xMyPrice = eval(Price)();
    xEMA = ema(Length, xMyPrice);
    xHigh_EMA = efsInternal("Calc_xHigh_EMA", xEMA);
    bInit = true;
  }
  nHigh_EMA = xHigh_EMA.getValue(0);
  return nHigh_EMA;
}

function Calc_xHigh_EMA(xEMA) {
  var nRes = 0;
  if (xEMA.getValue(-1) == null) return;
  nRes = high(-1) - xEMA.getValue(-1);
  if (nRes == null) nRes = 1;
  return nRes;
}