Aroon

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Aroon.efs  EFSLibrary - Discussion Board
  

File Name: Aroon.efs


Description:
Aroon


Formula Parameters:
Length : 14

Notes:
This formula requires the AroonUp.efs and AroonDown.efs formulas which
must be in the same folder.
The Aroon indicator was developed by Tushar Chande in 1995. Aroon is used to
measure the presence and strength of trends.
Aroon can be drawn either as two lines, the AroonUp and AroonDown, or an
Aroon Oscillator representing the difference between the AroonUp and the
AroonDown lines. The AroonUp and AroonDown lines oscillate between 0 and 100,
while the Aroon Oscillator oscillates between -100 and +100.
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.
AroonUp will be 100 when the instrument is setting new highs for the period.
Conversely, AroonUp will be 0 if the instrument has continually dropped throughout
the period. AroonDown is calculated in a similar manner, expect looking for lows
as opposed to highs.

Download File:
Aroon.efs
AroonUp.efs
AroonDown.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:            Aroon     Version:            1.0  05/14/2009    Formula Parameters:                     Default:    Length                              14    Notes:    This formula requires the AroonUp.efs and AroonDown.efs formulas which     must be in the same folder.    The Aroon indicator was developed by Tushar Chande in 1995. Aroon is used to     measure the presence and strength of trends.    Aroon can be drawn either as two lines, the AroonUp and AroonDown, or an     Aroon Oscillator representing the difference between the AroonUp and the     AroonDown lines. The AroonUp and AroonDown lines oscillate between 0 and 100,     while the Aroon Oscillator oscillates between -100 and +100.    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.     AroonUp will be 100 when the instrument is setting new highs for the period.     Conversely, AroonUp will be 0 if the instrument has continually dropped throughout     the period. AroonDown is calculated in a similar manner, expect looking for lows     as opposed to highs. **********************************/function preMain() {    setStudyTitle("Aroon UP/DN");    setCursorLabelName("ArnUp",0);    setCursorLabelName("ArnDn",1);    setDefaultBarFgColor(Color.green,0);    setDefaultBarFgColor(Color.red,1);    var fp1 = new FunctionParameter("nInputPeriod", FunctionParameter.NUMBER);        fp1.setName("Length");        fp1.setLowerLimit(1);        fp1.setDefault(14);}var bInit = false;var xArnUp = null;var xArnDn = null;function main(nInputPeriod) {    if (bInit == false) {        xArnUp = efsExternal("AroonUP.efs", nInputPeriod);        xArnDn = efsExternal("AroonDown.efs", nInputPeriod);        bInit = true;    }    return new Array(xArnUp.getValue(0), xArnDn.getValue(0));}