Automated trading systems, also referred to as mechanical trading systems, algorithmic trading, automated trading or expert advisor (EA), allow traders to code and automate their strategy into an automated system.
Once programmed, can be automatically executed via a computer.
The trade entry and exit rules can be based on simple conditions such as a moving average crossover, or they can be complicated strategies with multiple sets of rules for exit and entry.
By having an automated trading system, you certainly do not need to enter in any trades manually by hand. Once you define a strategy and programme it, the robot will enter and exit the trades in accordance to your defined strategy.