技术分析的一种方法。在收盘价的
移动平均线上下一个
标准差处各画一条线，便形成波林格区间。
标准差量度价格的
波动性，因此，这些区间随
波动性的变化或缩窄或扩大，即
市场平静时，区间缩小，
市场波动时，区间扩大。区间缩窄意味着新趋势的开始，这可从价格出现
突破并收于区间之外得以证实。波林格区间可用于任何价格走势图，但最常见的是与
柱状图一起使用（见图3）。
参见Bar Chart（柱状图），
Technical Analysis（技术分析），
Standard Deviation（标准差）。
Used in
technical analysis.
Bollinger bands are lines plotted one
standard deviation above and below the
moving average of the closing prices. A standard deviation measures price
volatility so these bands narrow and widen in line with volatility – narrow in calm markets and wide in volatile markets. The narrowing of the bands often indicates the start of a new trend, which is confirmed when prices break and close out of the band. Bollinger bands may be used with any price chart but are most commonly used with bar charts.
See also: Bar Chart, Technical Analysis, Standard Deviation
www.bollingerbands.com
