As Keanes said "The market can stay irrational for longer than you can stay solvent".
And, probably, more reasons. That's one contrary indicator that seems to be very reliable.
People are quick to downvote and say you're crazy, but often, you're just early. And it can definitely take time for public opinion (which drives things like stock) to catch up.
The point is, that watch is verifiable accurate twice daily, you can look at it and will tell you exactly the right time. It will do so 365 days per year, which is 730 times. This is a very large number of accurate predictions without being useful at all.
The only kind of useful predictions are the ones that you are prepared to back with either money or deeds. Words alone really don't cut it, in fact, with words alone your accuracy decreases.
A good way to find out where people stand on a prediction is to ask them to back that prediction with money. If you're willing to stake $500 on each of your predictions then you may still be wrong but you'll be a lot more careful with what it is exactly that you predict than if there is no downside to you for your prediction being wrong.