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));
}