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###  | Bollinger Bands |

| The Bollinger Band tab is used to add Bollinger Bands to a chart. If you want both the upper and lower bands and a midline to show, you will need to apply this dialog three times. Once for each Study Type selection. You may make each band a different color and/or line type if you wish. Other variables are the Time Period for which it is calculated and the number of standard deviations used for calculating the bands.

The Lower Band will use a negative value for the No. of Std Deviations, (the minus sign will be automatically applied if you switch the study type to Lower. The Mid Line is a simple moving average of the Time Period specified, while the Upper and Lower Bollinger bands are this value plus or minus the number of standard deviations specified. You can learn more about Bollinger bands at John Bollinger's website. The Line Attributes group specifies the Width as well as the of the color of the study line. The [Color] button is used to change the color of the line. Pressing [Apply] or [OK] creates or modifies the study.

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