Bitfinex specialises in digital currency traders and liquidity providers, offering exchange and margin trading and margin funding wallets. This platform supports a huge range of crypto currencies and also allows USD and € fiat currencies after account verification. It has a very simple to understand user guide in its ‘beginner’s guide to bitfinex’ and broad tours and guides section, so this site really does cater for everyone, as long as they take trading seriously. They don’t accept US residents and you will only be able to start trading when you have more than 10,000 USD of equity. Very competitively priced.