: The middle band plus two standard deviations . It often marks potential "overbought" areas.
Bollinger Bands are a versatile volatility indicator developed by John Bollinger in the 1980s. They consist of three lines that "breathe" with the market, expanding when volatility increases and contracting when it decreases. Bollinger Band Trading
The Bollinger Bands Trading Strategies: With Practical Charts and Codes to Use : The middle band plus two standard deviations
: The middle band minus two standard deviations. It often marks potential "oversold" areas. Three Primary Trading Strategies Go to product viewer dialog for this item. Bollinger Band Trading