CMC Markets is a CFDs and Forex broker with a wide presence worldwide. They present a proprietary trading platform that allows you to trade Forex, indices, commodities, shares and treasuries via CFDs and spread bets (UK & Ireland only). Its pricing is quite competitive, and it provides 24-hour customer service whenever the markets are open.CMC Markets is a CFDs and Forex broker with a wide presence worldwide. They present a proprietary trading platform that allows you to trade Forex, indices, commodities, shares and treasuries via CFDs and spread bets (UK & Ireland only). Its pricing is quite competitive, and it provides 24-hour customer service whenever the markets are open.