DESCRIPTION: below you can find a step-by-step guidance in case you would like to provide any login information for your proxy server after installing your MT5 in your PC.
POSSIBLE REASON: sometimes, the efficiency of MT5 can be hindered by network latency and connection issues. A proxy server is an intermediate between the trader's computer and the trade server. It is mostly used by internet providers or by local networks. If you have any connection problems, contact your system administrator or ISP.
RESOLUTION STEPS: If you use a proxy server, configure the platform accordingly.
- On the top menu, select "Tools"
- A drop-down menu will appear, select "Options"
- Switch to the "Server" tab and check the box called "Enable proxy server"
- This enables proxy server support and activates the "Proxy..." button.
- Select "Proxy..." in order to set it up
For further check refer to
https://community.deriv.com/t/mt5-proxy-server/30981 or here for proxy server setup