文件名称：Trading]_Technical_Stock_Analysis
文件大小：103KB
文件格式：PDF
更新时间：2017-06-08 16:01:13
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Developed by John Bollinger,Blooinger Band allows users to compaer volatility and relative price levels over a period time.Bollinger Band are envelopes which surround the price bars on a chart.They are plotted two standard deviations away frok a simple moving average. Because stadnard deviation is a measure of volatility ,the bands adjust themselves to ongoing market conditions . They widen during volatile market periods and contract during less volatile periods. Bollinger Bands are,essentially,moving standard deviation bands.