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Aroon Oscillator

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  • Aroon Oscillator

    File Name: ArnOsc.efs

    Description:
    Aroon Oscillator

    Formula Parameters:
    Length : 14

    Notes:
    This formula requires the AroonUp.efs and AroonDown.efs formulas which
    must be in the same folder.
    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.
    Aroon Oscillator indicator is calculated according to this formula:
    AroonOscillator = AroonUp - AroonDown


    Download File:
    ArnOsc.efs
    AroonUp.efs
    AroonDown.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:        
        Aroon Oscillator
        
    Version:            1.0  05/15/2009
        
    Formula Parameters:                     Default:
        Length                              14
        
    Notes:
        This formula requires the AroonUp.efs and AroonDown.efs formulas which 
        must be in the same folder.
        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.
        Aroon Oscillator indicator is calculated according to this formula:
        AroonOscillator = AroonUp - AroonDown

    **********************************/

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

    var 
    bInit false;
    var 
    xArnUp null;
    var 
    xArnDn null;

    function 
    main(nInputLength){    
        if (
    bInit == false) {
            
    xArnUp efsExternal("AroonUP.efs"nInputLength);
            
    xArnDn efsExternal("AroonDown.efs"nInputLength);
            
    bInit true;
        }
        return (
    xArnUp.getValue(0) - xArnDn.getValue(0));

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