To be honest, I wouldn't get very excited about 8-15% per quarter on an individual account -- you'd need to have quite a long track record for anyone to take note.
As for trading for others, make sure they know what they are getting into. But before that, make sure YOU know EXACTLY how you've made your money in the past, and why you should continue to make money in the future.
As for trading for others, make sure they know what they are getting into. But before that, make sure YOU know EXACTLY how you've made your money in the past, and why you should continue to make money in the future.