Power Of Trend

TrendPower.efs  
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File Name: TrendPower.efs

Description:
Power Of Trend

Formula Parameters:

• Length Fast : 4
• Length Slow : 8

Notes:

Download File:
TrendPower.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:        
    Power Of Trend
    
Version:            1.0  11/03/2009
 
Formula Parameters:                     Default:
    Length Fast                         4
    Length Slow                         8
    
Notes:
    
**********************************/
var fpArray = new Array();
var bInit = false;

function preMain(){
    setPriceStudy(false);
    setShowCursorLabel(false);
    setShowTitleParameters(false);
    setStudyTitle("Power Of Trend");
    setCursorLabelName("ff", 0);
    setPlotType(PLOTTYPE_HISTOGRAM, 0);
    setDefaultBarFgColor(Color.lime, 0)
    setDefaultBarThickness(5, 0);
    setCursorLabelName("vk", 1);
    setPlotType(PLOTTYPE_HISTOGRAM, 1);
    setDefaultBarFgColor(Color.blue, 1);
    setDefaultBarThickness(5, 1);
    setCursorLabelName("vd", 2);
    setPlotType(PLOTTYPE_HISTOGRAM, 2);
    setDefaultBarFgColor(Color.red, 2);
    setDefaultBarThickness(5, 2);
    setCursorLabelName("vj", 3);
    setPlotType(PLOTTYPE_HISTOGRAM, 3);
    setDefaultBarFgColor(Color.green, 3);
    setDefaultBarThickness(5, 3);
    var x = 0;
    fpArray[x] = new FunctionParameter("LengthFast", FunctionParameter.NUMBER);
    with(fpArray[x++]) {
        setName("Length Fast")
        setLowerLimit(1);
        setDefault(4);
    }    
    fpArray[x] = new FunctionParameter("LengthSlow", FunctionParameter.NUMBER);
    with(fpArray[x++]) {
        setName("Length Slow")
        setLowerLimit(1);
        setDefault(8);
    }        
}

var xMAFast = null;
var xMASlow = null;
var xVTS = null;

function main(LengthFast, LengthSlow) {
var nBarState = getBarState();
var vv = 0;
var ff = 0;
var vk = 0;
var vd = 0;
var vj = 0;
    if (nBarState == BARSTATE_ALLBARS) {
        if(LengthFast == null) LengthFast = 4;
        if(LengthSlow == null) LengthSlow = 8;
	}
	if(LengthSlow <= LengthFast) LengthSlow = LengthFast + 1;
	if (bInit == false) {
        xMAFast = wma(LengthFast);
        xMASlow = wma(LengthSlow);
        xVTS = efsInternal("Calc_VTS", LengthFast, LengthSlow);
        addBand(0, PS_SOLID, 1, Color.black, "Zero");	
        bInit = true;
	}
    f0 = xMAFast.getValue(0);
    f1 = xMASlow.getValue(0);
    vv = xVTS.getValue(0);
    if (f1 == null || vv == null) return;
    ff = f0 - f1;          
    vk = (vv + ff) / 2;
    vd = (vv / 2);           
    vj = (ff - vd);
    return new Array(ff, vk, vd, vj);
}

var bSecondInit = false;
var xOHLC4 = null;

function Calc_VTS(LengthFast, LengthSlow) {
var nRes = 0;
var i = 0;
var j = 0;
var vts = 0;
var vtsCurr = 0;
var v0 = 0;
var v1 = 0;
    if (bSecondInit == false) {
        xOHLC4 = ohlc4();
        bSecondInit = true;
    }
    if (xOHLC4.getValue(-LengthSlow) == null) return;
    for (i = 0; i <= LengthSlow; i++) {      
        vtsCurr = 0;
        if (i != 0) {
            for (j = 1; j <= i; j++) {
                vtsCurr += xOHLC4.getValue(-j);
            }
            vtsCurr = vtsCurr / i;
        } 
        vts = vts + vtsCurr;
        if(i == LengthFast) v0 = vts / LengthFast;
        if(i == LengthSlow) v1 = vts / LengthSlow;                  
    }
    nRes = v0 - v1;
    return nRes;
}