Do I need to close open trades if I have an Expert Advisor installed on my VPS?

No, installing an Expert Advisor in a terminal inside your VPS does not require closing open trades.

However, if you have an EA installed while you have open orders on your account, you may need to refresh the terminal to make it appear; here it is:

1. After installing the EA, log in to your MT4/MT5 terminal.
2. Find the Navigator window and right-click on the Expert Advisor and select Refresh.
3. Now, all installed EAs will be displayed.

You can perform these steps safely without closing any open trades within the terminal.