Of course, automatic trading is not without risks. Any sort of hopeful trading carries a major risk and good profits during the past are no guarantee that a system will continue doing well in the future. There are risks especially from breaking forex news, and you will need to take account of this in your use of a currency exchange robot if you do not want news releases to mess up your trading. You will have to check the commercial calendar and close trades by hand or set up the robot not to trade at particular times.
You will have a forex system that works rather well and brings in good profits, but since you cannot be online twenty-four hours a day to watch all the currency pairs, you are sure to miss some trading prospects. But it is possible to automate systems by making software that will apply them for you. This is how almost all of the current forex trading software came to be developed.
Robots change in that some require more input from you than others. If you are already a successful trader, you may wish to have a very flexible program so that you can put in your full system. You want to have a look for expert advisors, which are pre-made programs for MetaTrader 4.