Developed by John Bollinger, this technique is one of the most popular forms of envelope or channel indicator. Two winding parallel lines above and below a central moving average (MA) create a band that contains the majority of price movements within a channel. This is similar to moving average envelopes. The difference is that Bollinger Bands are also sensitive to volatility in the market. The bands spread further apart during volatile markets and come closer together during calmer markets. Read full report: http://www.chartfilter.com/reports/c7.htm Bollinger Bands, Envelopes and Channels - http://www.chartfilter.com/newsletter/newsletter3.htm Screening Bollinger Bands and MACD - http://www.chartfilter.com/screenernewsletter/nl6.htm All Bollinger Band Articles: http://www.chartfilter.com/education/indicators/2.htm More technical analysis indicators: http://www.chartfilter.com/education/technicalanalysis.htm Subscribe to our monthly technical analysis educational newsletter, an excellent resource for traders. Sign up here: http://www.chartfilter.com/archivednewsletter.htm Need to learn more? See what our technical analysis education books have to offer! http://www.chartfilter.com/ebooks.htm StockTools and StockScreener: Technical and fundamental screens, charts, alerts, portfolio, signal reports and more: http://www.chartfilter.com/products.htm http://www.chartfilter.com Technical Analysis and Stock Tools