The is a port of one of wonderful indicators described in the Mark Whistler's "Volatility illuminated" book. For details about the indicator please follow www.fxvolatility.com site to buy an e-book version of the book or buy a paper version of the book at amazon. The book is really good and worth to buy it.
Note: The indicator is a bit optimized during porting, however the result are carefully checked against the MT4 version with different sets of the parameters.
Download the indicator:
MT4 / MQ4 version can be found here.
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The indicator was revised and updated