The value of the moving average around which the upper and lower Bollinger Band are derived.
Syntax: BBBasis(Source, Length, StdDev, Interval, [Ref], [Symbol])
Source = Required.
Length = Required. Number of periods of type "Interval" in the Moving Average.
StdDev = Required. The number of standard deviations from the basis line.
Interval = Required.
[Ref] = Optional.
[Symbol] = Optional.
Comments:
In RavenQuote the defaults are: Length = 20, StdDev = 2.
Examples:
BBBasis(Close, 20, 2, 5, 0, YHOO)
The latest basis value (moving average) using the Closing Price, with a 20 5-minute bar moving average for YHOO.