IndicatorsIntermediateJune 4, 2025· 8 min read
布林带：解读波动率和价格极值
布林带在市场波动时扩张，在平静时收缩。学习如何解读压缩形态、识别突破信号，以及将布林带作为动态支撑与阻力使用。
Bollinger Bands place a volatility envelope around price, auto-widening in fast markets and contracting in quiet ones.
Structure
| Band | Formula | Purpose |
|---|---|---|
| Middle | 20 SMA | Trend baseline |
| Upper | Middle + 2 SD | Upper extreme |
| Lower | Middle − 2 SD | Lower extreme |
The Squeeze
Squeeze = Big Move Coming
Tight bands mean volatility collapsed. A large directional move almost always follows. But wait for direction confirmation before entering.
Walking the Bands
Touching the Band Is Not a Reversal
In a trend, repeated band hits mean momentum. Only fade bands in confirmed ranging markets.
Mean Reversion
Range Trade Example
BankNifty ranges 48,000–50,500. Price hits lower band at 48,100. Middle band at 49,200. Long targeting middle band: 1,100 pts potential with tight stop.
Key Takeaways
- 布林带 = 20日SMA加上下方各2个标准差的轨道。
- 带宽扩大 = 波动率增加；带宽收窄（压缩）= 突破即将来临。
- 价格触及上轨在趋势中不是卖出信号——而是强势的表现。
- 压缩形态预示大行情即将来临，但不指示方向。
- 价格触及外轨后往往会回归中轨（20日SMA）。