Introduction
The Alligator Indicator is a technical analysis tool designed to help traders identify market trends, gauge their strength, and detect potential buy/sell signals. It was developed by Bill Williams, an acclaimed trader and author of several trading books.
Also see: Gator Oscillator
Construction of the Alligator Indicator
The Alligator Indicator comprises of three lines, the jaw, the teeth, and the lips, each representing a moving average calculated over varying time periods.
The Jaw (blue line) - The jaw line is typically a 13-period Smoothed Moving Average (SMA) that is shifted by 8 bars into the future
The Teeth (red line) - The teeth line is typically an 8-period SMA shifted by 5 bars into the future
The Lips (green line) - The lips line is typically a 5-period SMA shifted by 3 bars into the future
When the three lines are intertwined, the Alligator is dormant, and the market is consolidating. In contrast, when the lines diverge, it signals that the Alligator is stirring, and the market is trending. The direction of the trend is determined by the relative positions of the lines. If the Lips are above the Teeth and the Teeth are above the Jaw, it’s a bullish trend, and if the Lips are below the Teeth and the Teeth are below the Jaw, it’s a bearish trend.
Traders can use the Alligator Indicator to pinpoint entry and exit points and set stop-loss levels. When the lines converge and the market is consolidating, traders may wait for a breakout before opening a position. Conversely, when the lines diverge, traders may enter a trade and establish a stop loss below the most recent swing low in a bullish trend or above the most recent swing high in a bearish trend.
Using the Alligator Indicator in trading
Here are some general guidelines on how to effectively use the Alligator Indicator in trading:
Identify the Trend
The first step is to determine the trend by examining the position of the Jaw, Teeth, and Lips. If they’re intertwined, the market is consolidating, and traders should avoid opening any positions. If they’re diverging, the market is trending, and traders should look for potential trade opportunities.
Look for Trade Opportunities
Once the trend is identified, traders can search for buy opportunities in a bullish trend or sell opportunities in a bearish trend. Technical analysis tools, such as support and resistance levels, chart patterns, and other indicators, can assist in confirming trading signals.
Wait for Confirmation
Once you have identified a potential trend, or discovered a trade opportunity, wait for confirmation before entering a position. Confirmation can come in the form of a breakout above or below a key level of support or resistance, or a candlestick pattern that indicates a continuation of the trend.
Set your entry/exit points and Stop Losses
Once you have identified a trade opportunity, you can set your entry and exit points. You can use the Alligator Indicator to help you set your stop loss and take profit levels. Always set a stop loss to limit your potential losses in case the market moves against you. For example, in a bullish trend, you can set your stop loss below the most recent swing low in a bullish trend, and your take profit level at a resistance level or a Fibonacci retracement level or above the most recent swing high in a bearish trend.
Use Other Indicators
While the Alligator Indicator can be useful in detecting trends, it should not be used in isolation. Always use it in conjunction with other technical indicators, such as oscillators or volume indicators, to confirm trading decisions.
Practice Good Risk Management
Always practice good risk management. This means risking only a small percentage of your trading account on any one trade, and avoiding the temptation to overtrade or chase losses. Remember that trading is a marathon, not a sprint, and it is better to make consistent profits over time than to try to hit home runs with every trade.
Practice and Refine Your Strategy
Like any trading strategy, using the Alligator Indicator necessitates practice and refinement. Backtesting your strategy and analyzing your trades can help identify what works and what doesn’t. Experimenting with different timeframes and settings for the indicator can also help determine what works best for you.
In conclusion, the Alligator Indicator is a useful technical analysis tool that can help traders identify trends, potential buy/sell signals, and the strength of a trend in the financial markets. By using the indicator in conjunction with other technical analysis tools, traders can increase their chances of making profitable trading decisions.
However, it is important to note that no trading indicator or strategy can guarantee profits in the financial markets. The use of the Alligator Indicator should be accompanied by proper risk management practices and a thorough understanding of the market conditions. Traders should also be aware that past performance is not indicative of future results, and the market can be volatile and unpredictable. Therefore, traders should carefully consider their trading objectives, risk tolerance, and experience level before using the Alligator Indicator or any other trading strategy.
Bill Williams on the Alligator Indicator

Bill Williams, the inventor of the Alligator indicator, recommended utilizing it alongside other indicators to spot trading opportunities. He asserted that the Alligator indicator is particularly useful in identifying market trends and price momentum. To use the Alligator indicator effectively, Williams proposed the following techniques:
Determining trend direction
The Alligator indicator can help traders determine if the market is trending or ranging. A tightly intertwined Alligator with its three lines suggests that the market is ranging, while separated lines moving in a particular direction indicate a trending market.
Measuring trend strength
Traders can get an idea of the strength of the present trend by examining the space between the Alligator’s three lines. The wider the distance, the stronger the trend.
Generating entry and exit signals
Williams recommended using the Alligator indicator in tandem with other indicators such as oscillators and moving averages to identify entry and exit points. A bullish signal, for example, can be created when the Alligator’s three lines cross over each other and the price is above the moving average. Overall, Williams thought that the Alligator indicator can be a valuable tool for traders in identifying market trends and momentum, and for producing trading signals when used with other indicators.
Advantages & Limitations of using the Alligator Indicator
Here are some advantages and limitations to consider when using the Alligator indicator in trading:
Advantages
- Trend direction: The Alligator indicator can help traders identify whether the market is trending or ranging, allowing for more accurate entry and exit points.
- Trend strength: The distance between the Alligator’s three lines can provide insight into the strength of a trend, helping traders make more informed decisions.
- Easy to use: The Alligator indicator is user-friendly and doesn’t require complex calculations or analysis.
- Compatible with other indicators: The Alligator can be combined with other indicators to generate more reliable signals and confirm potential trades.
Limitations
- False signals: No technical analysis tool is foolproof, and the Alligator indicator is no exception. False signals can occur, and traders should use caution when relying solely on this indicator.
- Lagging indicator: Since the Alligator is a lagging indicator, it may not identify trends as they emerge. To confirm signals, traders should use it in conjunction with other indicators.
- Limited scope: The Alligator indicator is primarily designed to identify trend direction and strength and may not be useful in other trading scenarios, such as range-bound markets or choppy conditions. Traders should use their discretion when applying it to specific market conditions.
- It’s important to note that while technical analysis tools such as the Alligator indicator can be helpful, they cannot guarantee success in trading. Traders should also incorporate fundamental analysis and other factors in their decision-making process.
The Alligator indicator is a popular tool that can help traders identify trend direction and strength in the market. With its easy-to-understand visual representation and simple interpretation, it is widely accessible to traders of all skill levels. When used in conjunction with other indicators, the Alligator can offer a more comprehensive view of market conditions and generate more accurate trading signals.
It’s crucial to remember that no indicator can guarantee success in trading, and the Alligator indicator is not an exception. Traders should use the Alligator indicator in combination with other technical analysis tools and fundamental analysis to make informed trading decisions. Furthermore, past performance is not a guarantee of future results, and traders should always be cautious and practice risk management when trading.