As a retail client, you receive negative balance protection if adverse market movements result in your account balance falling below €0.00. This means your balance would be automatically reinstated to €0.
We also offer trading tools to manage your risk and help avoid that situation, including stops, guaranteed stops and take-profit orders. Please note that basic stop-losses are not guaranteed, and guaranteed stop-losses incur a small fee if triggered.
However as a professional client, you are not eligible for negative balance protection, and your losses may exceed the deposits you have made. You can find out more about professional accounts here.
Please see the following page on our website which explains these tools further: https://capital.com/understanding-the-importance-of-stop-loss-orders