Whether you’re new to trading or experienced, Bollinger Bands offer valuable insights into price movements, helping traders make better decisions.
Understanding how they work can be the key to a profitable strategy. This guide covers the basics of Bollinger Bands, their components, and how to use them in different strategies.
What are Bollinger Bands?
John Bollinger created Bollinger Bands in the 1980s. The tool has three bands: the middle is a simple moving average, and the outer bands are plotted at a set number of standard deviations from it.
It’s used to gauge market volatility and try to pinpoint whether conditions have become either overbought or oversold. These outer bands expand and contract based on market volatility and, therefore, provide valuable insight into the potential price action by traders.
The middle band usually consists of a 20 period simple moving average that acts as the benchmark for price action. The upper and lower bands are usually set two standard deviations away from the middle band.
This setting of standard deviation is crucial because it dances according to the volatility of the price in the market. When the volatility goes up, the bands expand, and when the volatility goes down, the bands contract.
How Do Bollinger Bands Work?
Bollinger Bands offer a unique perspective on market behavior. Traders use them to determine whether the market is overbought or oversold, conditions that can portend potential trading opportunities. The main idea behind Bollinger Bands is that prices tend to stay within the upper and lower bands, with price fluctuations occurring around the middle band. Here’s how the components work:
1. The Middle Band (Simple Moving Average): The middle band is a simple moving average that is usually set to 20 periods. This acts like a baseline or a reference point for price action, showing whether the market is in an uptrend, downtrend, or ranging.
2. The Upper Band: This is set two standard deviations above the middle band. It represents the overbought threshold. If the price approaches or goes above this band, that could be an indication that the asset is becoming overbought and a reversal might be close.
3. The Lower Band: The lower band is two standard deviations below the middle band and sets the oversold threshold. When the price approaches or falls below this band, it could signal that the asset is oversold, and a reversal to the upside may be likely.
4. Standard Deviation: Standard deviation is a statistical measure of volatility. It says how much the price of an asset is deviating from its average. In a volatile market, this distance between the bands widens up, while during tranquil markets, the bands contract.
Key Concepts in Bollinger Bands Trading
Before diving into specific strategies, it’s important to understand some key concepts that will help you make the most out of Bollinger Bands.
1. Band Squeeze
A band squeeze implies the price action has compelled the Bollinger Bands closer together, which evidences low market volatility. Generally, this is an indicator of an imminent larger movement in price with higher volatility. Many traders consider a squeeze a kind of warning of a breakout, either upside or downside, depending on other considerations.
2. Breakouts
The price breaking above the upper band can be an indication of overbought conditions of the asset and a near reversal. Conversely, the price breaking below the lower band could mean that the asset is oversold and might see a reversal upwards. However, breakouts can also mean a continued trend, especially when this is supported by strong momentum.
3. Band Walk
A band walk occurs when the price moves along one of the outer bands, usually the upper band in an uptrend, or the lower band in a downtrend. This behavior indicates that the trend is strong and price may keep riding the band until some kind of reversal is achieved.
4. Trend Reversals
Bollinger Bands can be employed to locate possible reversals in trends. In this respect, touching or going outside the outer bands may signal overextension of an asset and, thus, could reverse. It is usually important to confirm these with other indicators or chart patterns to avoid false signals.
How to Use Bollinger Bands in Your Trading Strategy
Now that we’ve covered the basics of Bollinger Bands, it’s time to explore how to incorporate them into a trading strategy. While Bollinger Bands are effective on their own, they are best used in combination with other technical indicators to increase the accuracy of trade signals. Below are a few common strategies for using Bollinger Bands in your trading:
1. Bollinger Band Breakouts
A breakout occurs when the price moves outside of the upper or lower band. Traders often interpret this as a signal of a potential new trend or a continuation of the current trend.
Buy Signal, When the price breaks above the upper band, it may indicate a continuation of the uptrend. Traders may enter a long position, especially if other indicators like the Relative Strength Index (RSI) or Moving Average Convergence Divergence (MACD) confirm strong bullish momentum.
Sell Signal Conversely, if the price breaks below the lower band, this could indicate a continuation in the downtrend. Traders may open a short position if other indicators also confirm the bearish trend.
2. Bollinger Band Reversals
Another application of Bollinger Bands is in identifying points of reversal. This involves looking for the price to touch the upper or lower band and then reverse toward the middle band the 20 period SMA.
Buy Signal, If it comes into contact with or momentarily crosses below the lower band before bounding upward, this means it may be oversold, and a price flip to higher levels could eventually materialize. This serves as a potential buy signal.
Sell Signal, If the price touches or exceeds the upper band and then pulls back, it might mean the asset is overbought and a reversal may come soon. It is potentially an opportunity to open the short position.
3. Bollinger Band Squeeze and Breakout Strategy
The Bollinger Band squeeze is considered by many to be one of the strongest signals of potential future price action. As the bands squeeze, this can be a signal that the market is consolidating, building energy for a breakout. Traders normally want to see a squeeze followed by a breakout above the upper band or below the lower band as a possible trading signal.
Identify the Squeeze: A period is identified when bands are contracting, indicating a period of low volatility.
Wait for Breakout: After identifying the squeeze, a breakout above the upper band or below the lower band has to be awaited.
Enter the Trade: Once the breakout occurs, confirm the move with other indicators like volume or momentum oscillators. If the breakout is supported by strong momentum, enter the trade in the direction of the breakout.
4. Bollinger Band Trend Following
Bollinger Bands can also be used to follow trends. In strong trends, the price often moves along one of the outer bands, indicating that the trend is strong and may continue.
Identify a Strong Trend: Look for a period where the price is consistently touching or walking along the upper band (in an uptrend) or the lower band (in a downtrend).
Execute the Trade: Once there is evidence of a proper trend, traders can take long positions during an uptrend or short positions during a downtrend. The player needs to stay in the trend and exit only upon a possible reversal, shown by prices moving away from the band.
Other Indicators with Bollinger Bands
Although Bollinger Bands are powerful on their own, they can be even more effective when combined with other technical indicators. Here are a few common indicators that work well with Bollinger Bands:
1. Relative Strength Index (RSI): The RSI can be used to confirm overbought or oversold conditions. When the RSI reaches extreme levels (above 70 for overbought and below 30 for oversold), combined with price touching the outer bands, it strengthens the case for a potential reversal.
2. Moving Average Convergence Divergence (MACD): The MACD is a momentum oscillator that shows the confirmation of the power and direction of a trend. If the MACD lines are moving in the same direction as the price along the bands, it’s additional confirmation for a following strategy.
3. Volume: Volume can also be a confirmation of breakouts in volume. If the price breaks out of the bands with high volume, this is a good sign for the continuation of such breakouts.
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Frequently Asked Questions (FAQs)
How do I confirm signals from Bollinger Bands?
- Although Bollinger Bands are tremendous, one must use the signals of these bands along with other indicators, either RSI, MACD, or volume indicators, so as to reduce the prospect of a fake signal and confirm it.
Can Bollinger Band be used for scalping?
- Yes, Bollinger Bands are effective for scalping, especially when combined with other short-term indicators. Traders typically look for small price movements and use the bands to identify potential entry and exit points in a highly liquid market.
What are the limitations of Bollinger Bands?
- Bollinger Bands are not perfect and at times can create false signals, especially in choppy or sideways markets. You should not use them in isolation but as part of a greater strategy that also includes risk management and other indicators.
Can I use Bollinger Bands in all markets?
- Yes, you can apply Bollinger Bands to all financial markets, including stocks, forex, commodities, and crypto. Yet, Bollinger Bands may turn out to be more or less effective in some conditions and for different states of volatility in the market.
Do Bollinger Bands work with all types of trading?
- Day traders, swing traders, and long-term investors can use Bollinger Bands. Still, they work the best when combined with other indicators under an overall trading strategy.