Forex System Trading Forex system trading is a type of forex trading where positions are entered and closed according to a set of well-defined rules and procedures. For a fee, the automated trading system can scan for, execute and monitor trades, with all orders residing on the server. EAs can take advantage of more opportunities than a human can. Establishing Trading «Rules». One of the biggest challenges in trading is to plan the trade and trade the plan. Someone can not simply flick a switch and watch the money roll in while doing nothing.