The Aroon indicator is a trend-following tool that functions as a momentum oscillator. It measures how much time has passed since the highest high and lowest low occurred within a specified period.
The indicator helps traders identify trends and sideways markets. When prices repeatedly reach new highs or lows, this may signal a strong trend. In this guide, you’ll learn how the Aroon indicator system works, what trading signals it generates, and how to apply it to your trading strategies.
The article covers the following subjects:
Major Takeaways
-
The Aroon indicator is an oscillator that helps determine trend direction, trend strength, and consolidation periods. It consists of two lines: Aroon Up, which tracks price highs, and Aroon Down, which tracks price lows. Both lines range from 0 to 100%.
-
The indicator measures how recently the highest high and lowest low occurred within the lookback period specified in the settings. When Aroon Up reaches 100% and remains there for several consecutive candlesticks, it signals a strong uptrend. Similarly, when Aroon Down stays at 100%, it points to a strong bearish trend.
-
Advantages: Helps identify emerging market trends and assess their persistence.
-
Disadvantages: Does not measure the magnitude of price movements or account for trading volume.
-
The Aroon indicator is often used to confirm trade signals from other trend-following indicators and validate trend-continuation patterns.
What Is the Aroon Indicator?
The Aroon indicator is a technical analysis tool designed to identify trend direction and strength, as well as periods of consolidation or sideways movement. It was developed by Tushar Chande in 1995.
The Aroon indicator is a trend-following tool that identifies existing trends by tracking how recently price highs and lows have been reached. When new extremes occur frequently, the indicator signals a strong trend. When prices go longer without reaching new highs or lows, it may indicate fading momentum or a transition to a flat market.
Here is how to use Aroon indicator. It is displayed in a separate window below the price chart and consists of two lines. The first line, Aroon Up, measures how recently the highest price was recorded within the period specified in the settings. The second line, Aroon Down, reflects how recently the lowest price was recorded within the same period. Both lines fluctuate between 0% and 100%. The closer a line is to 100%, the more recently its corresponding price extreme occurred. Sustained high readings can indicate that a trend is gaining or maintaining strength.
Advantages of the Aroon indicator:
-
Early trend identification. Crossovers between the Aroon Up and Aroon Down lines may signal a shift in market direction and the emergence of a new trend. With a shorter lookback period, the indicator may generate signals earlier than some other trend-following tools
-
Trend strength and persistence assessment. Aroon helps evaluate how consistently a trend is being maintained. For example, Aroon Up remaining near 100% while Aroon Down stays low is characteristic of a sustained uptrend.
-
Signal filtering. The indicator can help confirm signals from other technical analysis tools, including the RSI, Stochastic Oscillator, moving averages, and key-level breakouts.
-
Versatility across markets. Because Aroon is based on the time elapsed since the most recent high or low, it can be applied to a wide range of assets, regardless of their typical volatility levels.
Drawbacks of the Aroon indicator:
-
False signals in sideways markets. During consolidation, frequent new swing highs and lows can cause the Aroon lines to cross repeatedly without establishing a sustained trend.
-
No measurement of price movement magnitude. The indicator tracks when new highs or lows occur, but does not measure how far the price has moved or account for trading volume. For example, if the price reaches a new high by just one point, Aroon Up can still rise to 100%, potentially suggesting a stronger trend than the price action warrants.
-
No volatility measurement. Aroon does not indicate the size of typical price fluctuations, so it cannot independently determine appropriate stop-loss or take-profit distances.
Aroon is used as a supplementary tool in trend-following strategies to confirm signals from other technical analysis methods, such as moving averages, chart patterns, and other trend-following indicators.
Aroon Indicator Formula and Settings
Aroon Indicator settings:
-
Length — the calculation period, measured in candlesticks. The indicator uses this period to identify the highest highs and lowest lows.
-
Price Precision — the number of decimal places used to display the indicator’s values.
In MT4 and MT5, you can also add 30 and 70 levels to visualize the indicator lines.
Aroon indicator formula:
Aroon Up Line = ((N – Number of periods since the last high) / N) * 100%
Aroon Down Line = ((N – Number of periods since the last low) / N) * 100%
N – the period specified in the settings.
Example 1. Period 25. The highest price over a 25-candlestick period was observed 5 candlesticks ago. Calculation:
Aroon Up: (25 – 5) / 25 * 100% = 80%
Example 2. Period 25. The current candlestick’s price is the lowest in the 25-candlestick segment. Calculation:
Aroon Down: (25 – 0) / 25 * 100% = 100%
Several modified versions of the Aroon indicator are available:
-
Aroon Oscillator. Displays a single line or histogram calculated as the difference between an Aroon Up indicator line and Aroon Down.
-
Smoothed Aroon. Applies additional smoothing, typically using moving averages, to reduce fluctuations in the indicator’s readings.
-
Aroon Alerts/Arrows. Displays arrows on the price chart when the Aroon lines cross, indicating the potential direction of a trade.
-
Aroon MTF (Multi-Timeframe). Displays Aroon readings from a higher timeframe on a lower-timeframe chart, helping traders assess the broader trend.
These versions are available for MetaTrader and cTrader.
Aroon on MT4, MT5 and the LiteFinance Terminal
The Aroon indicator is not included in the standard toolset of many trading platforms. One exception is LiteFinance’s browser-based trading platform, which offers the indicator as part of its built-in tools.
In MT4/MT5, you need to add the indicator manually. Here’s how to add it in MT4:
-
Download the installation file.
-
In MT4, go to the top menu and select: File/Open Data Folder.
-
Copy the indicator file into the MQL4/Indicators folder.
-
Restart MT4. The Aroon indicator should then appear under Insert/Indicators/Custom.
In MT5, the installation process is similar; you just need to download the installation file for MetaTrader 5.
How to Read Aroon Indicator Signals
The Aroon indicator helps distinguish between trending markets and ranging markets by tracking price momentum. Unlike many oscillators, it provides a quick visual overview of current market conditions.
-
A directional trend. When Aroon Up rises above 70 while Aroon Down falls below 30, this suggests a strong uptrend. Conversely, when Aroon Down rises above 70 and Aroon Up falls below 30, it signals a potential downtrend.
The blue line represents an uptrend, while the yellow line indicates a downtrend. As the screenshot shows, the indicator is relatively effective at confirming trends, although it tends to lag behind price movements. Therefore, focus on signals that confirm a sustained trend, such as consistently high Aroon Up readings within the 70–100% range (red rectangle).
The trend direction and strength are determined by the relative positions of the indicator lines and their values within the 0–100% range.
Aroon indicator signals:
|
Signal |
Description |
Action |
|
Aroon Up > 70, Aroon Down < 30 |
New highs were recently set, while new lows were set a long time ago |
A steady uptrend. Build positions on pullbacks |
|
Aroon Up > 70, Aroon Down < 30 |
New lows were recently set, while new highs were set a long time ago |
Hold a short position. Don’t try to catch the bottom |
|
Aroon Up crosses Aroon Down from below |
A new uptrend is forming |
Look for confirmation of the signal and open a long position |
|
Aroon Down crosses Aroon Up from below |
A new downtrend is emerging |
Wait for confirmation of the signal and open a short position |
|
Aroon Up falls below 50 |
Upward momentum is waning; buyers are losing strength |
Reduce the stop-loss distance and lock in a part of the profit on the long position |
|
Aroon Down falls below 50 |
Downward momentum is fading, and bears are struggling to maintain their momentum |
Reduce the stop-loss distance and lock in a part of the profit on the short position |
|
Aroon Up or Down has been at the 100 level for a long time |
Peak trend strength; the market may be overbought or oversold |
Do not open new trades in the direction of the trend; look for reversal signals |
|
Both lines lie roughly in the 30–70 range and often intersect |
Neither buyers nor sellers have a sustained advantage; there are no new highs or lows |
Volatile market, sideways movement. Do not open new trades. |
|
Both lines are below 50 or 30 |
No trend |
Stay out of the market |
Aroon Indicator Trading Strategies
Trading strategies using the Aroon indicator based on moving averages. Key signals of the Aroon technical indicator:
However, the Aroon indicator can produce false signals when used on its own. Therefore, the SMA serves as the primary indicator, while Aroon acts as a supplementary tool to confirm signals. You can also add the Relative Strength Index (RSI) as an extra filter, although this will reduce the number of trading opportunities.
Aroon Indicator strategy for Forex trading:
-
Currency pair: EUR/USD. Time frame: H4.
-
SMA (9): Purple line. SMA (50): Green line.
-
Aroon (34): The period is extended to 34 candlesticks to provide more reliable confirmation of moving-average signals on the higher time frame. Since the goal is to confirm the broader trend rather than anticipate short-term price movements, the indicator’s lag matters less.
The primary trading signal is a crossover of the moving averages: the fast SMA (9) crossing above the slow SMA (50) signals an uptrend, while a cross below signals a downtrend. Confirmation comes when the price breaks above both moving averages in an uptrend or below both in a downtrend.
In the area highlighted by the rectangle, the moving averages generate three signals, but they are weak:
-
1 — At the time of the price breakout, both Aroon lines are near 100%. This may indicate frequent new highs and lows, suggesting volatile, directionless price action rather than a sustained trend.
-
2 — False signal. The moving averages cross, and the price breaks upward. Aroon Up (blue) forms two peaks (4), while Aroon Down (yellow) declines. However, no sustained trend develops. In such cases, a stop-loss helps limit potential losses.
-
3 — The Aroon indicator does not confirm the moving-average signal, as both lines are declining in parallel.
A new signal then emerges, supported by a long bullish candlestick (5). Aroon Up forms two peaks (6), while Aroon Down remains low (7), generating a buy signal. In the following section, Aroon Up continues to confirm the uptrend, forming another peak (8). Meanwhile, Aroon Down stays near 0%, indicating no new lows as price continues to reach new highs.
9 — Risk zone. Aroon Up remains elevated for an extended period, indicating a persistent uptrend. However, this alone does not mean the market is overbought or that a reversal is imminent. Aroon Down has entered the 70–100% zone only once.
A conservative exit strategy is to close the position when Aroon Up crosses below Aroon Down while Aroon Up is declining (10). A similar exit signal appears at the second crossover after the risk zone (11).
Second example:
The moving averages generate a clear bearish signal: the fast purple line crosses below the slow line, while the price forms a series of bearish candlesticks. Aroon confirms the signal as the blue Aroon Up line crosses below the yellow Aroon Down line. The yellow line remains in the 70–100% range for an extended period, while the blue line stays below 30%, confirming a sustained downtrend. Short positions are opened in the direction of the prevailing trend, with position sizes increased during corrective pullbacks only when the strategy’s risk rules allow. A trailing stop is used to protect profits as the price moves lower.
Aroon Oscillator: How to Read the Zero Line
The Aroon Oscillator is a derivative of the Aroon indicator that combines its two lines into a single plot. It is calculated using the following formula:
Aroon Oscillator = Aroon Up – Aroon Down
The oscillator fluctuates between −100 and +100, with the zero line marking the midpoint. Some versions display the oscillator as a histogram to make changes in momentum easier to identify.
Aroon Oscillator signals:
|
Signal |
Description |
|
The Aroon Indicator line is above 0 and pointing upward |
Uptrend: new highs occur more frequently than recent lows |
|
The line is below 0 and pointing downward |
Downtrend: new lows appear more frequently than recent highs |
|
Crossing 0 from below |
Emerging or strengthening uptrend |
|
Crossing 0 from above |
Emerging or strengthening downtrend |
|
Above +50 |
Uptrend is becoming more pronounced |
|
Below -50 |
Downtrend is becoming more pronounced |
|
Approaching +100 |
Clear trend, but the market is overbought. A reversal may occur soon |
|
Approaching -100 |
Clear trend, but the market is oversold. A reversal may occur soon |
|
Fluctuations around 0 |
Neither buyers nor sellers have a clear advantage; a sideways trend (flat) is likely |
Although the Aroon Oscillator is effective at identifying emerging trends by incorporating the time elapsed since recent highs and lows, it has one key drawback: during consolidation, it can generate numerous false signals. You can download the MT4 version of the oscillator via this link.
Limitations and False Signals Indicator
The main limitation of the Aroon indicator is that it measures only the time elapsed since the most recent price extremes, ignoring the magnitude of price movements. As a result, it can generate misleading signals, particularly in choppy or low-volatility markets. The Average True Range (ATR) indicator can be used alongside Aroon to assess market volatility.
Limitations and false signals of the Aroon indicator:
-
Ignores the magnitude of price movements. Aroon considers only the number of candlesticks since the most recent high or low. For example, a sharp 5% price increase in a single candle followed by a flat market may produce an Aroon Up reading similar to a gradual 0.1% increase over 10 days. The indicator does not measure percentage change or price distance.
-
False breakout signals. If the price exceeds a previous high by just a few points before quickly reversing, Aroon Up may jump toward 100%. This can suggest a strong bullish trend even when the breakout lacks follow-through, and the price is rejected at resistance.
-
Signal lag. Aroon relies on historical price data over a specified lookback period. Crossovers that signal a potential trend reversal may occur after a substantial portion of the price movement has already taken place.
-
Sensitivity to the calculation period. Short lookback periods make the indicator more responsive but can also increase noise and false signals. Longer periods generally produce smoother readings but may delay signals and reduce the relevance of entry points.
-
Frequent crossovers in sideways markets. During consolidation, Aroon Up and Aroon Down may cross repeatedly, creating the impression of multiple trend reversals even when the price lacks sustained directional momentum.
There is no single piece of advice on how to mitigate these shortcomings since no indicator is perfect. Therefore, the only solution is to combine Aroon with other tools and test different settings against historical price data using a strategy tester, evaluating profitability, drawdowns, and signal reliability rather than focusing solely on achieving a smooth upward equity curve.
Conclusion
The Aroon indicator is a trend-following oscillator that helps identify trend direction and assess its sustainability. Aroon Up tracks how recently the highest price was recorded, while Aroon Down tracks the most recent low. When either line rises into the 70–100 range and approaches 100, it may indicate a developing or sustained trend in the corresponding direction.
Use the indicator alongside other technical analysis tools, such as moving averages and the Average Directional Index (ADX), to confirm potential trend reversals, breakouts from key levels, and channel breakouts. Higher time frames, such as H1 and above, may produce more reliable signals by filtering out some short-term market noise, although they can also generate lagging signals.
Put the Aroon indicator into practice by opening a demo account on the LiteFinance web platform. You’ll have access to more than 70 other technical indicators that you can combine with Aroon to explore and test different trading styles and strategies.
Get access to a demo account on an easy-to-use Forex platform without registration
How to Use Aroon Indicator FAQs
The content of this article reflects the author’s opinion and does not necessarily reflect the official position of LiteFinance broker. The material published on this page is provided for informational purposes only and should not be considered as the provision of investment advice for the purposes of Directive 2014/65/EU.
According to copyright law, this article is considered intellectual property, which includes a prohibition on copying and distributing it without consent.



