No, not 24/7 since there are market hours when you can trade Forex and CFDs.

For Forex currency pairs

You can trade from Monday 00:05 to Friday 23:50 in GMT+2(GMT+3 for summer time).

You can not trade on the weekends.

For CFDs

Market hours are different for each market.

Please refer from XM’s website.

You can also check the Market Hours on the platform directly. (right click on ‘Market Watch’ go to ‘Symbols’ and ‘Properties’)

XM Official Website