Subject: Re: Maybe, the tide turned
My guess is that a "Coppeck sell" that occurs significantly above the zero line is not going to work out, since the market can recover and resume its uptrend without passing below the zero line that makes a "Coppeck buy" possible. Some kind of alternative buy signal is going to be required, I think.

To my eye (and using Wikipedia's "daily data" proxy on Stockcharts) this happened in the spring of 2018. That "Coppeck sell" didn't turn into a "Coppeck buy" until last week (again, eye-balling the daily data proxy).

Here's the chart I'm looking at:

https://schrts.co/nmjyTIjY

Baltassar