Bollinger Bands
Bollinger Bands show volatility and help traders see whether prices are unusually stretched or unusually calm around a moving average.
Start the lessonIntroduction
Volatility in a visual band
Bollinger Bands are a chart tool that uses a moving average plus upper and lower bands. The width of the bands tells you how volatile the price has been recently.
The short answer
Bollinger Bands help you see whether price is unusually stretched above or below its recent average, which often signals a possible change in volatility.
How the bands work
Price, average, and volatility
Middle band
Usually a moving average, showing the central trend line.
Upper band
Often shows a higher volatility band or stretched price zone.
Lower band
Often shows a lower volatility band or possible discounted zone.
Simple example
Check the spread
Band width = ₹24.00. This suggests high volatility.
Common mistakes
Bands are useful, but they can mislead
Thinking price touching a band guarantees a reversal
Bands only show how stretched prices may be, not the exact next move.
Ignoring the trend
A stock can stay near the upper band during a strong uptrend.
Using bands without volume or structure
Price action and context still matter.
Forgetting risk management
Volatility can remain high even after a small bounce.
Key points
What to remember
- Bollinger Bands combine a moving average with upper and lower bands.
- The width of the bands shows volatility.
- Wider bands usually mean higher volatility.
- Narrower bands often mean lower volatility.
- Bands help show when prices may be stretched relative to recent averages.
- They are useful tools, but they do not predict exact outcomes on their own.
This lesson is for education only, not personalized financial or investment advice. Bollinger Bands are a chart tool used to understand volatility and price extremes.
Quiz