i wld put the rate of success at 30% for 1 trade, 10% for 10 trades and zero for 20 trades and above. even trader who do this as a profession find it hard - the level of discipline required is amazing & a lot of time it takes a little craziness to be successful. I know, I've been there.
If these people promoting such get rich seminars are true to their claims - why do they bother to waste their time with seminars..they can earn 10x they get per seminar within a few trades, as claimed. Out of their good heart to share their success? Gimme a break...