Do you ever know the outcome of a trade from the beginning?
Impossible to know, "crystal ball" is a scam and so are fortune tellers and those who claim to know which coin is going to rise in the next few hours thus selling it as a "signal".
So in as much as you are very good with your TA+FA I think it's also necessary to maintain good behaviors in the market.
Indeed, being able to control those bad emotions whenever market is rising or dropping is important. Be the balls of steel person here, you just have to execute the proper trade and not get scared. The objective is to be able to run the positions such that you profit, in the meantime you have to hold your ground and wait it out, painfully often for months.
As we put it this way, trading signals are not reliable at all. If someone will offer you such service, keep in mind that they are only after for the money. Up until npw, no signal trading groups have become popular because they are giving useful signals.