@fluxchart: Bollinger Bands help traders understand volatility. When the bands expand, volatility is increasing. When they tighten, price is compressing. That is why the Bollinger Band squeeze matters so much. A tight range can often come before a bigger move. The key is not just watching the bands, but waiting to see how price reacts after the breakout. Swipe through to learn how Bollinger Bands work and how traders use them.