There are forex traders who use trading signals for automatic execution, the trader in question simply subscribes to signals and then performs the setup based on the instructions then checks that the desktop continues on full 24 hours (usually this trader will hire a vps). After all stages on the run trader stay monitor the signals do execution buy / sell. This signal will be executed directly by meta trader automatically. So the trader just make sure his computer is on and can do other activities while occasionally seeing his trading execution.
At first glance is sophisticated and very practical, but behind the advantages there are also disadvantages. Among them is the matter of connection and electric current. The computer must be kept on for 24 hours a week. Because the open / close positions will continue non-stop. If metatrader die suddenly there is a possibility that the position being opened is not closed. In addition you will miss a profitable trading position. So traders who subscribe to signals with automatic execution are advised to rent a VPS that is close to the server that provides a signal to minimize delay or slippage. Non automatic signal sends signals through instant messaging such as whatsapp, email, sms, or notification in the meta trader directly. After the signal is sent trader must execute manually within the time period already set. Usually this signal is not durable, high accuracy only lasts a few moments aja then after that will change again.