The Aroon indicator was developed by Tushar Chande. Aroon is a Sanskrit word meaning "dawn's early light" or the change from night to day. The Aroon indicator allows you to anticipate changes in security prices from trending to trading range. These changes are anticipated by measuring the number of periods that have passed since the most recent x-period high and x-period low. Therefore, the Aroon indicator consists of two plots; one measuring the number of periods since the most recent x-period high (Aroon Up) and the other measuring the number of periods since the most recent x-period low (Aroon Down).
The actual plotted value is a "stochastic" like scale (see Stochastic Oscillator) ranging from 0 to 100. Assuming a default time-period of 14 days, if a security makes a new 14-day high, the Aroon Up = 100; when the security makes a new 14-day low, the Aroon Down = 100. When the security has not made a new high for 14 days, the Aroon Up = 0; when the security has not made a new low for 14 days, the Aroon Down = 0.
