To be a successful trader one needs to develop a strategy that will work in all market conditions, start by studying the methods of some of the most successful traders and investors of our time, learn from the best and combine their methods:-
W Buffet: Be greedy when others are fearful, be timid when others are greedy
Medallion: Have a clear view, let the objective reach whether it takes a moment or seasons
Edd Thorp: master hedging and scale out of losses
Victor Niederhoffer: Don't play the other person's game
Stanley Druckenmiller: Watch the market insiders to predict economic slowdown
We each need to develop our own style revolving around individual life constraints and comfort levels, trading is challenging for all but the ones that find it satisfying will be more successful than the ones that find doing it frustrates them, trading is not for everyone.
Besides developing a good strategy, a successful trader also needs to preserve capital, placing S/Ls isn't always the best way to preserve capital as many STOPS in a row can deplete capital. As Edd Thorp said, if you can master hedging, this will keep a status quo even when markets turn against the positions, hedging can substitute S/L and magnify results. Indeed good trading requires to be in the right direction most of the time, but even this, requires protection against temporary reversals... STOPS can often turn an otherwise good position into a loss, hedging, as an alternative to S/L and when done properly, can save the position until the temporary reversal recovers, and, can itself generate a profit.
Hedging does have a cost but using it can also give the trader >3,000 ROI compared to >200 ROI when using STOPS on the 1:3 principal. So, if you scalp just on technicals then continue with the S/L strategy, but if you trade on fundamentals then hedging is a better way to go... remain convicted to the fundamentals (Medallion's strategy) but take out insurance against sentiment swings, when sentiment goes against the fundamentals then, rather than STOP the positions, add to them, being hedged will allow you to do that and come out the other side with 6 fugure profits.