Toppcats, I'm not quite sure how to read your charts (there's a lot going on in there), but it looks like they are daily data. If so, market holidays can cause a shift between weekly and daily charts, especially in the several months either side of the new year. How does that look on a weekly basis?
Running the cycle as 16 x 2 (or 32 week) was more interesting Don't forget to divide by 2, too!
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