Image sources: instaforex.
This is the indicator, developed by Tushar Chande. It is mainly used to identify the strength and direction of the trend.
When it crosses the Aroon down bottom-up, it is likely to emerge as uptrend. In reverse to above, we can consider it as The bearish trend.
When the signal occurs above 40% and below 40%, it calls extreme zones and there is a chance to strengthen the signal.
Ref: instaforex