what is the aroon oscillator 
the aroon oscillator is a trend following indicator that uses aspects of the aroon indicator aroon up and aroon down to gauge the strength of a current trend and the likelihood that it will continue understanding the aroon oscillatoraroon oscillator readings above zero indicate that an uptrend is present while readings below zero indicate that a downtrend is present traders watch for zero line crossovers to signal potential trend changes they also watch for big moves above 50 or below 50 to signal strong price moves the aroon oscillator was developed by tushar chande in 1995 as part of the aroon indicator system chande s intention for the system was to highlight short term trend changes the name aroon is derived from the sanskrit language and roughly translates to dawn s early light the aroon indicator system includes aroon up aroon down and aroon oscillator the aroon up and aroon down lines must be calculated first before drawing the aroon oscillator this indicator typically uses a timeframe of 25 periods however the timeframe is subjective using more periods garners fewer waves and a smoother looking indicator using fewer periods generates more waves and a quicker turnaround in the indicator the oscillator moves between 100 and 100 a high oscillator value is an indication of an uptrend while a low oscillator value is an indication of a downtrend aroon up and aroon down move between zero and 100 on a scale of zero to 100 the higher the indicator s value the stronger the trend for example a price reaching new highs one day ago would have an aroon up value of 96 25 1 25 x100 similarly a price reaching new lows one day ago would have an aroon down value of 96 25 1 x100 the highs and lows used in the aroon up and aroon down calculations help to create an inverse relationship between the two indicators when the aroon up value increases the aroon down value will typically see a decrease and vice versa 