Aroon oscillator
The difference between Aroon Up and Aroon Down as a single line, simplifying the Aroon Indicator into one trend-direction signal.
What the numbers mean
The same lookback as the Aroon indicator — this simply plots Aroon Up minus Aroon Down on a single −100 to +100 scale, so one line carries what two lines said.
- 14 or 25 — the same lookback as the Aroon lines it is built from
- +100 — today made the window's high and the low is maximally stale
- −100 — the reverse
- ±50 — common thresholds for treating a trend as established
How it is used
Read as a trend-direction gauge: strongly positive means recent highs are fresher than recent lows, strongly negative the reverse, and readings near zero mean neither side has made a new extreme lately.
- Crossing above zero → recent highs are fresher than recent lows
- Staying above +50 → a persistent uptrend
- Hovering around zero → no side is making new extremes; range conditions
How it relates to everything else
It is the single-line form of the Aroon indicator and loses one piece of information in the process: a zero reading can mean both lines are high or both are low, which are very different markets. Traders who need that distinction keep the two-line version on the chart.
- Zero line crossings ≈ Aroon Up and Aroon Down crossing
- Use with ADX for strength, since Aroon only measures timing
- Reads well against price channels, which mark the same highs and lows it is counting
What to watch for
Collapsing two lines into one hides which side is doing the work — a reading of zero can mean both lines are high or both are low, and those are very different markets.