bb01 http://www.finkraft.com if price tags the upper band and in

来源: 于 2011-06-11 08:16:11 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

Bollinger Bands approach volatility from the perspective of standard deviation. The Bands themselves are plotted a certain number of standard deviations above and below a specified moving average. The most commonly used settings are 20-days for the average and 2 standard deviations of closing price.

 

http://www.finkraft.com/index.php?option=com_content&view=article&id=64:bollingerbands&catid=55:volatilityindicators&Itemid=77