Why not? I'm already better than 90% everywhere else. No joking. I don't even try that hard and I sill perform better than 90% at work compare to everyone else even people who's been there for 20 years.
Fair enough. If +200% ROI in 2 months (in retail account terms) is bad, then what do you consider to be good?!
The OP asked: When is the right time to quit your job and trade full time? The answer is never. Giving up a good job to trade is probably the single most foolish thing a person can do careerwise.