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 Trailing Stop?

Trailing stops are dynamic stop-loss orders that can be set to shadow the market price, staying within a certain predefined pip range so as to secure profits when price action moves in a trader’s favour. A trailing stop can be set to become active after the market moves by a predefined number of pips at which point it will begin to follow the market price, always remaining within in certain number of pips from the current price.