John Ehlers Discrete Fourier Transform - indicator for MetaTrader 5
Fourier transform applied to charts of currency pairs with the construction of a spectrogram. By John Ehlers. Description of mathematics by link (eng.): https://www.mesasoftware.com/papers/FourierTransformForTraders.pdf
The 2 Pole Butterworth Filter - indicator for MetaTrader 5
The indicator was created by John Ehlers and described in his book "Cybernetic Analysis For Stocks And Futures", page 192. This is one of its many noise-cutting filters.
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