If your goal is to become fabulously wealthy over a lifetime then it's all about the QUALITY of the investments. Timing is a minor consideration. That's a key lesson from Warren Buffett, and that's the way I've always invested.
Besides, you'll never be good at timing. No one is.
Becoming wealthy over a lifetime concerns almost no one on these online flipper groups where trades are driven by the casino-like thrill of a quick payoff... to buy a nice boat perhaps or a bigger pickup truck. I don't see many investors here even thinking in terms of a more secure retirement, and most "players" won't have one.
Read some classic investment texts by Ben Graham, or anything by Buffett. One might argue that RadioShack was a Buffett-type stock 15 years ago. But not in recent years.
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Because the Good Life is Just a Pump or Two Away