Indicator of Trend Alteration

[eSignal]

File Name: TrendAlteration.efs

Description:
Indicator of Trend Alteration

Formula Parameters:
Trigger : 16

Notes:


Download File:
TrendAlteration.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:        
    Indicator of Trend Alteration
    
Version:            1.0  06/16/2009
 
Formula Parameters:                     Default:
    Trigger                             16
    
Notes:

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

function preMain(){
    setPriceStudy(false);
    setShowCursorLabel(true);
    setShowTitleParameters(false);
    setStudyTitle("Trend Alteration");
    setCursorLabelName("TAUp", 0);
    setDefaultBarFgColor(Color.red, 0);
    setPlotType(PLOTTYPE_HISTOGRAM, 0);
    setDefaultBarThickness(2, 0);
    setCursorLabelName("TADn", 1);
    setDefaultBarFgColor(Color.blue, 1);
    setPlotType(PLOTTYPE_HISTOGRAM, 1);
    setDefaultBarThickness(2, 1);
    var x = 0;
    fpArray[x] = new FunctionParameter("Trigger", FunctionParameter.NUMBER);
    with(fpArray[x++]) {
        setLowerLimit(1);
        setDefault(16);
    }    
}

var xTAUp = null;
var xTADn = null;

function main(Trigger) {
var nBarState = getBarState();
var nTAUp = 0;
var nTADn = 0;
    if (nBarState == BARSTATE_ALLBARS) {
        if(Trigger == null) Trigger = 16;
    }
    if (bInit == false) {
        addBand(0, PS_SOLID, 1, Color.black, "Zero");    
        xTAUp = efsInternal("Calc_TrendAlteration", Trigger);
        xTADn = getSeries(xTAUp, 1);
        bInit = true;
    }
    nTAUp = xTAUp.getValue(0);
    nTADn = xTADn.getValue(0);    
    if (nTAUp == null) return;
    return new Array(nTAUp, nTADn);
}

var bSecondInit = false;
var xHigh = null;
var xLow = null;

function Calc_TrendAlteration(Trigger) {
var nRes1 = 0;
var nRes2 = 0;
var nPrice = 0;
    if (bSecondInit == false) {
        xHigh = high();
        xLow = low();
        bSecondInit = true;
    }
    if (xHigh.getValue(-Trigger) == null) return;
    nPrice = xHigh.getValue(0);
    if (nPrice > xHigh.getValue(-1)) {
        nRes1 = 1;
        while (nPrice > xHigh.getValue(-nRes1) && nRes1 < Trigger) {
            nRes1++; 
        }
    }
    nPrice = xLow.getValue(0);
    if (nPrice < xLow.getValue(-1)) {
        nRes2 = 1;
        while (nPrice < xLow.getValue(-nRes2) && nRes2 < Trigger) {
            nRes2++; 
        }
        nRes2 = -nRes2;
    }
    return new Array(nRes1, nRes2);
}