John F. Ehlers introuced Dominant Cycle and Spectrogram Indicator in Mar, 2008.
In "Measuring Cycle Periods" in Mar, 2008, John Ehlers presented a very interesting technique of measuring dominant market cycle periods by means of multiple bandpass filtering. By utilizing an approach similar to audio equalizers, the signal (here, the...
Fourier Transform for Traders By John Ehlers, slightly modified to allow to inspect other than the 8-50 frequency spectrum.
high_pass_filter(source) Detrended version of the data by High Pass Filtering with a 40 Period cutoff
source : float, data source.
This indicator estimates price volatility and it is based on Volume only (presumably Tick Volume in Forex).
Tick volume is supposed to be a good proxy to actual volume in spot forex (study of Caspar Marney, 2011)
The advantage of this indicator is that it can be used with any pair, any timeframe.
The only parameters are the periods of the reference Volume Moving...
The Mesa Spectrum Dominant Cycle was created by John Ehlers and this is the foundation for many indicators he created that would later follow. This is his updated version of his original Mesa algorithm and I do not recommend this indicator as a stand alone for trading. This is more of an informational indicator that will tell you the current dominant cycle period...
The Spectrum Derived Filter Bank was created by John Ehlers (Stocks & Commodities V. 26:3 (16-22)) and this is technically two indicators in one. This will let you know the current cycle period which is in blue and the other indicator will let you know if you should buy the stock or not. Buy when it is green and sell when it is red.
Let me know if you would like...