I am currently testing a system for forex. It is beyond my ability to code this system for back testing due to it's complexity. I have therefore traded this system live on a small account. The system trades 0-2 times per day. I've recorded trades for 3 months (about 50 trades). How long does one need to test a system like this before putting real money into it? How many trades should it take and over what period before I can consider the results reliable?