The indicator has three components: "Upper Band", "Middle Band" and "Lower Band". These can be calculated by using the following formulas:
where:
"Length" is the number of chart points used in SMA (Simple Moving Average) when computing MATypicalPrice and MATrueRange
From "Indicator Properties" you can change the settings for indicator:
This dialog has three sections: "Upper Band", "Middle Band" and "Lower Band" from where you can set line thickness, color and style of components. You can also change the "Length" used in the calculation of moving averages.