Technical indicators like the Aroon indicator may be used to determine the direction and intensity of a trend as well as changes in an asset’s price. The indicator essentially counts the intervals between highs and lows over a given period of time. Strong uptrends and downtrends are supposed to often reach new highs and lows, respectively. When this is occurring, the indication lets you know, and when it isn’t.
The “Aroon up” line of the indicator, which gauges the strength of uptrends, and the “Aroon down” line, which gauges the strength of downtrends, make up the whole system.