Emotions when trading are quite dangerous. For example, you can make a good profit during the day and, succumbing to a second emotional impulse, lose everything in an instant. I've had that happen to me. That's why as soon as I feel that my emotions are getting the better of me I make a willful effort to turn off the computer.
Even not on trading on which emotions could really be resulting into bad decisions just because you cant really think up clearly and well on that time that you are enveloped with such emotions.
This is why on the time that you are trading then you should really be have that good control of it because if not then it would really just stir you up and wont be able to think up well
specially on the things that you are currently or recently in.
This is why having more experience does really give out that kind of learning which would be enhancing out your emotions which would really be helpful into your career path.