@mohelsheikh, this is a huge question. Actually, I think many will work quite well in the hands of some traders, but not necessarily of others. There is a purely personal aspect to trading that makes some tools exactly right for one trader, but not so for another.
This question actually comes up one way or another all the time. Let's hope that there is something in the replies that will help you and others.
You don't really need to have the best profitable strategy after all, just one that works, out of the many that are tried.
Good luck.
Bob.
When one door closes, another opens.
-- Cervantes, Don Quixote
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