No. You can lose the money in your account, but you can't lose more than that. Your account has negative balance protection: if a very fast market ever took your balance below zero, you wouldn't owe us anything. We'd cover the shortfall and reset your balance to zero.
CFDs are leveraged, so a small price move against you can cause a large loss.
If your margin level falls, we may close your positions. See 'What is the stop-out level?'
If prices gap, positions may close at a worse price than expected.
Risk warning: CFDs are complex instruments and come with a high risk of losing money rapidly due to leverage. Only trade with money you can afford to lose.