Bollinger Bands

They’re considered invaluable when it comes to analyzing price volatility, identifying potential trends, and making well-informed trading decisions. As additional benefits, you can use them on any actively traded financial asset (including cryptocurrencies) and across multiple time frames.

Below, you’ll find out more about Bollinger Bands and how to effectively use them when trading cryptocurrency assets.

What Are Bollinger Bands 

Bollinger Bands are part of volatility indicators and are widely embraced among traders. 

At the heart of Bollinger Bands lies the concept of the "squeeze." When the bands draw near, causing the moving average to constrict, it is referred to as a squeeze. This phenomenon signifies a phase of reduced volatility, often seen as a potential precursor to higher volatility in the future.

Bollinger Bands include 3 key components:

  1. The Middle Band (SMA): a simple moving average (SMA) of the asset's price over a specified period; it represents the indicator’s baseline as the mean or average price.
  2. Upper Band (SMA + 2 * Standard Deviation): this band is calculated by adding two times the standard deviation of the price to the middle band, indicating potential overbought conditions.
  3. Lower Band (SMA - 2 * Standard Deviation): this band is calculated by subtracting two times the standard deviation from the middle band, and shows potential oversold conditions.

The width of the bands reflects the volatility of the asset. The wider the bands, the more volatile the asset is; the narrower the bands, the less volatile the asset is.

bollinger bands indicator.png

How Do Bollinger Bands Work?

The Bollinger Bands are displayed as a set of three lines plotted over the asset prices:

  1. The middle line is a Simple Moving Average (SMA) of N periods.
  2. The upper band represents the value of the middle line plus k times the standard deviation (SD) of the price.
  3. The lower band shows the value of the middle line minus K times the standard deviation (SD) of the price.

The formula for calculating the upper and lower bands is:

Upper band = SMA + k x SD

Lower band = SMA - k x SD

Where k is the number of standard deviations, usually 2.

By default, most trading platforms use these parameters for Bollinger Bands, but you can change them and experiment with different values.

Interpreting Bollinger Bands Values

Bollinger Bands’ main role is to show traders if an asset is at an overbought level or oversold level. 

If the asset’s price is closer to the upper band, you can take it as an overbought signal. 

Similarly, if the asset’s price is closer to the lower band, it shows an oversold condition.

How to Apply Bollinger Bands’ Insights in The Cryptocurrency Market

  1. Measure volatility
    When a crypto asset’s price becomes more volatile, the distance between the upper and lower bands widens. Conversely, during periods of lower volatility, the bands contract. You can interpret wider bands as a sign of increasing market turbulence, signaling potential trading opportunities.
  2. Identify and follow market trends
    When the price is above the middle line and close to or touching the upper band, it indicates that there’s an uptrend and traders can look for buying opportunities. When the price is below the middle line and close to or touching the lower band, it indicates that there’s a downtrend and traders can look for selling opportunities.
  3. Spot potential trend reversals
    When the price makes new highs or lows outside the bands followed by highs or lows inside the bands, it indicates a potential trend reversal. Traders can look for confirmation signals from other indicators or candlestick patterns before entering or exiting a trade.

How to Combine Bollinger Bands with Other Technical Indicators

Traders frequently use Bollinger Bands along with other indicators to complement their trading strategies. The most common combinations include:

Bollinger Bands and Relative Strength Index (RSI)

Combining Bollinger Bands and the Relative Strength Index (RSI) might help you spot probable reversals. For instance, if the price is nearing the upper Bollinger Band and the RSI shows overbought circumstances, it can signal a trend reversal.

You can also use the RSI to confirm Bollinger Bands signals. When the Bollinger Bands are squeezing, check if the RSI is below 30 (oversold) or above 70 (overbought). For long trades, look for oversold conditions, and for short trades, look for overbought conditions.

Bollinger Bands and Moving Averages

Traders also rely on moving averages in combination with Bollinger Bands to add more context to trend analysis. Bollinger Bands and a moving average crossover approach, for instance, can support the confirmation of trend changes.

For long trades, look for the Moving Average Convergence Divergence (MACD) line crossing above the Signal line and rising above the zero line. For short trades, look for the opposite: the MACD line crossing below the Signal line and falling below the zero line.

Bollinger Bands and Stochastic Oscillator

One way to use Bollinger Bands and stochastic oscillator together is to look for overbought or oversold conditions within the bands.

When the price reaches the upper band, it may indicate that the market is overbought and due for a correction. When the price reaches the lower band, it may indicate that the market is oversold and due for a bounce.

Along with these signals, you should also look for the stochastic oscillator to reach above 80 for an overbought condition or below 20 for an oversold condition; this will reveal if the market is truly overbought or oversold.


Bollinger Bands are a versatile and powerful tool for cryptocurrency traders. They provide valuable insights into price volatility, potential trend reversals, and overbought/oversold conditions. 

Once you integrate Bollinger Bands into your trading toolkit, practice and refine your strategies to make the most of this powerful tool. 

With Altrady, you can significantly enhance your trading prowess. Apart from trading tutorials dedicated to novice traders, you can manage or trade assets over multiple exchanges with automation tools. Give Altrady platform a go with a free trial!