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 Dealing Desk?

In Forex trading a Dealing Desk is operated by brokers who act as Market Makers. Dealing Desks intervene between traders and liquidity providers. This allows them to set the levels of liquidity offered to traders and the prices, as well as being able to take the opposite side of a trader’s position. They make the market the client trades on and manage their own risk exposure accordingly.