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 Tick?

Often conflated with pip, a tick is the difference between the current market price and the last-quoted market price, in other words the amount a market has moved in a given time. Unlike a pip, a tick is not a fixed number, but one that fluctuates in real time depending on prevailing market conditions. For example, in a highly liquid market a tick may represent a single pip; on the other hand in an illiquid market it could represent a price move of 30 pips.