Simplest Bollinger Band calculation ever
Here are some over engineered answers
http://www.metastock.com/customer/support/kb/faq.aspx?fc=120#/120
http://www.investopedia.com/articles/trading/05/022205.asp
Here is the simplest yet but I wish more would it explain this exactly like this (the world would be more peaceful if this was the case)
http://www.great-trades.com/Help/bollinger%20bands%20calculation.htm
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