SilentOne, I saw the section of the video at the link you posted. I ran my software and was able to detect a prominent 14-15 year cycle as David demonstrated. The phasing matches the 1994 and 2009 lows closely.
The present top in the market due to the 3.4, 7.3 and ~14 year cycles implies the 3.4 and 7.3 year cycle lows straddle the 14 year cycle low. This projects a market bottom in ~4 years, when the 3.4 year cycle bottoms, the 14 year cycle is near the end of its downward move, and the 7.3 year cycle is mid-way up.
I need to try to detect a ~42 cycle using Dow Industrial data going back 80 years, which I suspect started from the late 1970's / early 1980's. Wouldn't it be something if the next larger cycle from the ~14 year were also topping now as well? If so. it's right translated, which means after this nasty crash it would be time to go all in and buy/hold for 18 years.