I've learned that whatever I think I know about market movements, a zillion other people also know, making what I know useless.
None of us are on the inside. We get "late" information. Useless for those think they are playing the market. The market is playing them.
"Nobody knows nothin'." -- John Bogle
I do follow this just for general comparison purposes:
https://www.multpl.comParticularly the PE ratios, both S&P actual and the Shiller.
The height at May 2009 is startling. Just unbelievable!
The thing that is driving the market to current heights is quite simple. There is no alternative.
Interest rates are so low that investors who seek any kind of return must risk being in equities.
The only reason to buy bonds or hold cash is for safety purposes.
As long as interest rates remain extremely low the market will be supported by inflows from investors.
There will be wild swings now and then of course.
Just my worthless opinion.