question about expert
Not, EA will not work in case you close Metatrader/computer or if you do not have internet connection of your Metatrader with the broker's server.
Traders are using VPS in case they want for their EAs (or signal subscription) to work in case they close Metatrader/computer.
- www.metatrader5.com
Of course not. Machine and Terminal not running, neither can code.
Leave it on, or run on a VPS. How to Subscribe to a MT4 Signal (new instructions, after 1065 version upgrade) - General - MQL5 programming forum 2017.04.10