Aroon Indicator

The Aroon Indicator, or "Dawn's Early Light" in Sanskrit, was developed by Tushar Chande in 1995.  Chande chose this name because the two up and down indicators are designed to reveal the beginning of a new trend.

Aroon Indicator

The Aroon Indicator, or "Dawn's Early Light" in Sanskrit, was developed by Tushar Chande in 1995.  Chande chose this name because the two up and down indicators are designed to reveal the beginning of a new trend.

The Aroon Indicator is used for identifying trends in an underlying security, determining how strong the trend is, and determining the likelihood of a trend reversal. 

The 20-day Aroon-Up measures the number of days since the stock recorded a 20-day high.  Likewise the 20-day Aroon-Down indicator measures the number of days since the stock experienced a 20-day low. Chartists can use the Aroon Indicator to spot emerging trends, identify consolidations, define correction periods and anticipate reversals.


Aroon Indicator Formula

The Aroon Indicator is shown in percentage terms and fluctuate between 0 and 100. They are plotted side-by-side for easy comparison.

Aroon Indicator formula

Application of the Aroon Indicator

Both plots oscillate between 0 and +100.  Trends (or lack thereof) are determined by examining extreme values of the two lines, parallel movement, and crossovers as summarized below:

  •  Extreme StrengthAroon Up  100  Aroon Down  0
  •  StrengthAroon Up  100  Aroon Down   > 0
  •  Up TrendAroon Up  70-100  Aroon Down  0-30
  • ConsolidationAroon Up  Parallel to Aroon Down  Aroon Down   -----
  •  Down TrendAroon Up  0-30  Aroon Down  70-100
  •  WeaknessAroon Up  < 100  Aroon Down  0
  •  Extreme WeaknessAroon Up  0  Aroon Down 100
Illustration of how to use the  Aroon Indicators

Chartists often use the Aroon Indicator to identify if a stock is trending or trading flat and then use other indicators to generate appropriate signals. For example, chartists might use a momentum oscillator  to identify oversold levels when Aroon indicates that the long-term trend is up.

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