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  • Aroon Up

    File Name: AroonUp.efs

    Description:
    Aroon Up

    Formula Parameters:
    Length : 14

    Notes:
    This formula is one of the components of the Aroon and Aroon Oscillator
    indicators.
    Developed by Tushar Chande in 1995, the Aroon is an indicator system
    that can be used to determine whether a stock is trending or not and
    how strong the trend is. "Aroon" means "Dawn's Early Light" in Sanskrit
    and Chande choose that name for this indicator since it is designed to
    reveal the beginning of a new trend.
    The Aroon indicator consists of two lines, Aroon(up) and Aroon(down).
    The Aroon Oscillator is a single line that is defined as the difference
    between Aroon(up) and Aroon(down). All three take a single parameter which
    is the number of time periods to use in the calculation. Since Aroon(up) and
    Aroon(down) both oscillate between 0 and +100, the Aroon Oscillator ranges
    from -100 to +100 with zero serving as the crossover line.
    AroonUp indicator is calculated according to formula:
    AroonUp = 100 * (Period - PeriodHigh) / Period
    where PeriodHigh = Number of bars since highest high of the Period
    AroonUp for a given time period is calculated by determining how much time
    (on a percentage basis) elapsed between the start of the time period and the point
    at which the highest closing price during that time period occurred. When the stock
    is setting new highs for the time period, AroonUp will be 100. If the stock has
    moved higher every day during the time period, AroonUp will be zero.


    Download File:
    AroonUp.efs



    EFS Code:
    PHP 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:        
        AroonUp  
        
    Version:            1.0  05/14/2009
        
    Formula Parameters:                     Default:
        Length                              14
        
    Notes:
        This formula is one of the components of the Aroon and Aroon Oscillator 
        indicators.
        Developed by Tushar Chande in 1995, the Aroon is an indicator system 
        that can be used to determine whether a stock is trending or not and 
        how strong the trend is. "Aroon" means "Dawn's Early Light" in Sanskrit 
        and Chande choose that name for this indicator since it is designed to 
        reveal the beginning of a new trend.
        The Aroon indicator consists of two lines, Aroon(up) and Aroon(down). 
        The Aroon Oscillator is a single line that is defined as the difference 
        between Aroon(up) and Aroon(down). All three take a single parameter which 
        is the number of time periods to use in the calculation. Since Aroon(up) and 
        Aroon(down) both oscillate between 0 and +100, the Aroon Oscillator ranges 
        from -100 to +100 with zero serving as the crossover line.
        AroonUp indicator is calculated according to formula:
        AroonUp = 100 * (Period - PeriodHigh) / Period
        where PeriodHigh = Number of bars since highest high of the Period
        AroonUp for a given time period is calculated by determining how much time 
        (on a percentage basis) elapsed between the start of the time period and the point 
        at which the highest closing price during that time period occurred. When the stock 
        is setting new highs for the time period, AroonUp will be 100. If the stock has 
        moved higher every day during the time period, AroonUp will be zero.
    **********************************/

    function preMain() {
        
    setStudyTitle("Aroon Up");
        
    setCursorLabelName("ArnUp"0);
        
    setDefaultBarFgColor(Color.red,1);
        var 
    fp1 = new FunctionParameter("nInputPeriod"FunctionParameter.NUMBER);
            
    fp1.setName("Length");
            
    fp1.setLowerLimit(1);
            
    fp1.setDefault(14);
    }

    var 
    bInit null;
    var 
    AryClose;

    function 
    main(nInputPeriod){
        var 
    vState getBarState();
        if (
    vState == BARSTATE_ALLBARS || bInit == false){
            
    AryClose = new Array(nInputPeriod+1);
            
    bInit true;
        }
        if (
    vState == BARSTATE_NEWBAR) {
            
    AryClose.pop();
            
    AryClose.unshift(high(0));
        } else {
            
    AryClose[0] = high(0);
        }
        if (
    AryClose[AryClose.length-1] == null) return;
        var 
    vIndex findHighIndex(AryClose);
        return ((
    nInputPeriod-vIndex)/nInputPeriod)*100;
    }

    function 
    findHighIndex(AryIn){
        var 
    vHighIndex 0;
        var 
    vHigh 0.0;
        
    vHigh AryIn[0];
        for(var 
    1AryIn.lengthi++){
            if (
    vHigh AryIn[i]) { 
                
    vHigh AryIn[i];
                
    vHighIndex i;
            }
        }
        return 
    vHighIndex;

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