Trading together with a friend can have its advantages. If one of you has more experience and the other more money, you can help your friend through your experience and he can help with margins.Together, you can trade larger size and perhaps make more profits. However, unless you both agree to the same line of action and what the possible contingencies might be, it is essential that you decide which of you is to execute the trades.If you are not absolutely sure about your partner, and you don’t agree with the way he trades, you are better off trading on your own.