TTR (version 0.21-1)

aroon: Aroon

Description

The Aroon indicator attempts to identify starting trends. The indicator consists of up and down lines, which measure how long it has been since the highest high/lowest low has occurred in the last n periods. Developed by Tushar Chande in 1995.

Usage

aroon(HL, n=20)

Arguments

HL

Object that is coercible to xts or matrix and contains either a High-Low price series, or a Close price series.

n

Number of periods to use in the calculation.

Value

• A object of the same class as HL or a matrix (if try.xts fails) containing the columns:
• aroonUp
  The Aroon up indicator.
• aroonDn
  The Aroon down indicator.
• oscillator
  The Aroon oscillator (aroonUp - aroonDn).

concept

trend

Details

Aroon up (down) is the elapsed time, expressed as a percentage, between today and the highest (lowest) price in the last n periods. If today's price is a new high (low) Aroon up (down) will be 100. Each subsequent period without another new high (low) causes Aroon up (down) to decrease by (1 / n) x 100.

References

The following site(s) were used to code/document this indicator: http://www.fmlabs.com/reference/Aroon.htm http://www.fmlabs.com/reference/AroonOscillator.htm http://www.linnsoft.com/tour/techind/aroon.htm http://stockcharts.com/education/IndicatorAnalysis/indic-Aroon.htm

See Also

See CCI, ADX, TDI, VHF, GMMA for other indicators that measure trend direction/strength.

Examples

## Get Data and Indicator ##
  data(ttrc)
  trend <- aroon( ttrc[,c("High", "Low")], n=20 )