The Aroon Oscillator

The Aroon Oscillator measures the strength of a trend. It is constructed by subtracting Aroon Down from Aroon Up. The Aroon Oscillator oscillates between -100 and +100 with zero as the center line. It signals an uptrend if it is moving towards its upper limit and a downtrend when it is moving towards the lower limit. The closer the Aroon Oscillator value is to either extreme the stronger the trend is.

Aroon Oscillator
Chart courtesy of Prophet Financial Systems