Bollinger Bands are plotted at standard deviations above and below a moving average to indicate a stock's volatility. You can set the following variables:
Type:
Upper - Plotted as standard deviation(s) above the moving average.
Lower - Plotted as standard deviation(s) below the moving average.
Standard Deviation Factor
The number of standard deviations used.
Moving Average Period
Number of days used in the moving average.
Series
Defines data points as being part of the open, close, high, or low.