Quote from Angrycat:
Great traders will never discuss what they do or how they do it with outsiders.
However, I've known a lot of great traders and I've known a lot of these people who will fly into a rage or break things after a bad day or a shitty trade. I've never ever met an emotionless trader. He may not reveal his emotions to YOU, but don't assume that means he/she isn't emotional. The key is to keep a lid on it until AFTER trading hours.
Most great traders are often bitter. But, they get over it. If you're a good trader, the money is good.
I'm talking about prop traders who trade professionally for institutions, not the guy with a retail account and another "real" job. I think it's a lot easier to be less emotional if you're just playing around with your own retail account. When your whole career and livelihood depends on it - hell yeah you get emotional.