If you have issues with data loading really slowly or data not populating at all you might have an issue with either your firewall (if you are working in a corporate environment) or your antivirus program (on a home machine).
If the firewall and antivirus program is very strict it will try to inspect the connection Web Trader have to our servers (where data is fetched from). The data transfer protocol is secure web sockets (wss). The firewall and antivirus program will try to inspect each web socket package to see if there is any malicious data and this can cause the data transfer to either not come through at all or to be very slow.
The workaround is to ask your IT administrator to whitelist the following domain: *.infrontservices.com
The * before the domain means that it is a wildcard whitelist. Meaning that all traffic sent on xxx.infrontservices.com will be whitelisted. This is the domain that market data is sent through.