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 Breakout?

Breakouts are more commonly used to refer to the occasion of an asset’s price pushing through a confirmed level of resistance, though it can sometimes also be used to refer to a downward move through a known support level. When an asset breaks through a resistance level this mark then becomes the asset’s new support. When it pushes through a support level this becomes its new resistance.