This is actually a more well known correlation than the Lunar Cycles. However... It's not a very predictable one. researchnews.osu.edu/archive/sunstock.htm Hilarious... Even my old college put out a paper on it! If you look at the data it's not a big enough correlation to bother with. Quant funds are quickly pricing out the correlation with the low ratio use of weather models in their formulas.
How did that exponential blowoff thru 1400 work out? What happened to the taylor sequence? Show us some tea leaf wisdom while you're at it. How about some Gann angles.