Request for "FFT or similar cycle measurement"

["Barry Silberman" <barry@xxxxxxxxxxxxxxxxxxxxx>]

Gary Fritz recently pointed out that

 "Ehlers' HD (Homodyne Discriminator to determine the current market cycle)
is also extremely noisy and he includes smoothers in
every indicator to try  to deal with that.  Still the result is MUCH noisier
than an equivalent  FFT  or similar cycle measurement."

Can someone help provide the EL code for FFT or "similar cycle measurement"
that may be more reliable.

TIA.

Barry Silberman