Haven't been here for a while but I see folks are still struggling to get it.
The obvious prerequisite to successful trading is obvious when you think about it. You need a method that actually works.
Imagine if you were cooking steaks for the first time. No matter how good the beef is, or how good your kitchen equipment is, if you don't use a method of cooking which produces good results, you'll end up with rubbish steaks. Do you think if you keep using the same method the steaks will eventually get better?
Will you find a good method for cooking steak in cookery books? Almost certainly. Will you find a good method for trading in trading books? Hmm.
How many people start out trading with a method that they know actually works? Which if they repeat over and over, day in day out, week in week out, month in month out, will deliver a positive P&L?
What use is all of this, I hear you ask? Well, being aware of this will save you wasting a lot of time and money on stuff that doesn't work. And by heck, there's a lot of it out there.