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public BandPass(DataSeries ds, int period, string description, double bandWidth = 0.25)

public static BandPass Series(DataSeries ds, int period, double bandWidth) public static BandPass(DataSeries ds, int period)

Parameter Description

dsA DataSeries object
periodLookback period
bandWidth(optional) Band width


Featured in John Ehlers' article from August 2019 issue of Technical Analysis of Stocks & Commodities magazine, the BandPass indicators is a two-pole bandpass filter. A band limiting filter like this is required to make the Voss predictive filter's output useful because market data has unlimited bandwidth.


Please refer to TASC August 2019 issue, "A Peek Into The Future (Ehlers)".

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