Yes, IBKR does offer trading on multiple Forex products.  The most heavily traded market is Forex cash, which is commonly known as the Spot Market.  This is an unregulated, decentralized market that does not have an exchange or standardized contracts.  It is a system of banks and interbank dealers that offer prices (liquidity) for various institutions and individuals to access and trade.  IBKR has access to numerous liquidity providers, including several of the largest in the world, through our IdealPro trading platform.  Since there are no standardized contracts in the Forex cash market, traders can place orders for various cash amounts, provided they use only whole numbers.  The minimum order size to access the Ideal Pro system is USD 25,000 or the equivalent in other currencies.   

IBKR also offers trading in Forex futures and options as well as a number of currency related products listed on the US securities option markets.