CFDs are a leverage product and can involve a significant risk of loss. Trading CFDs may not be suitable for all, therefore you should ensure that you understand the risks involved and take into account your individual circumstances.
Trader's Glossary

What is Stop-Loss Order?

An order to minimise losses incurred by a trader in the event that a trade moves in an unprofitable direction. This is done by automatically closing an open trade when the price reaches a level predefined by the trader.