Momentum Range Oscillator – EFS

MRO.efs
File Name: MRO.efs
Description:
Momentum Range Oscillator
Formula Parameters:
Length : 7
Notes:
Download File:
MRO.efs

EFS Code:
/*********************************
Provided By:  
    eSignal (Copyright c eSignal), a division of Interactive Data 
    Corporation. 2009. 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:        
    Momentum Range Oscillator
Version:            1.0  09/30/2009
 
Formula Parameters:                     Default:
    Length                              7
    
Notes:
    
**********************************/
var fpArray = new Array();
var bInit = false;

function preMain(){
    setPriceStudy(false);
    setShowCursorLabel(true);
    setShowTitleParameters(false);
    setStudyTitle("MRO");
    setCursorLabelName("MRO", 0);
    setPlotType(PLOTTYPE_LINE, 0);
    setDefaultBarFgColor(Color.red, 0);
    var x = 0;
    fpArray[x] = new FunctionParameter("Length", FunctionParameter.NUMBER);
    with(fpArray[x++]) {
        setLowerLimit(1);
        setDefault(7);
    }    
}

var xMRO = null;

function main(Length) {
var nBarState = getBarState();
var nMRO = 0;
    if (nBarState == BARSTATE_ALLBARS) {
        if(Length == null) Length = 7;
	}
	if (bInit == false) {
        xMRO = efsInternal("Calc_MRO", Length);
        bInit = true;
	}
	nMRO = xMRO.getValue(0);
	if (nMRO == null) return;
    return nMRO;
}

var bSecondInit = false;
var xMOM = null;
var xHLabsMA = null;

function Calc_MRO(Length) {
var nRes = 0;
    if (!bSecondInit) {
        xMOM = mom(3);
        xHLabsMA = sma(Length, efsInternal("Calc_HLabs"));
        bSecondInit = true;
    }
    nRes = xHLabsMA.getValue(0);
    if (nRes == null) return;
    nRes = Math.abs(xMOM.getValue(-1)) / nRes;
    return nRes; 
}

function Calc_HLabs() {
var nRes = 0;
    nRes = Math.abs(high(0) - low(0));
    return nRes;
}