The foreign exchange market works through financial institutions Forex Trading united kingdom England , and it
 operates on several levels. Behind the scenes banks turn to a smaller 
number of financial firms known as “dealers,” who are actively involved 
in large quantities of foreign exchange trading.  Most foreign exchange 
dealers are banks, so this behind-the-scenes market is sometimes called 
the “interbank market”, although a few insurance companies and other 
kinds of financial firms are involved. Trades between foreign exchange 
dealers can be very large, involving hundreds of millions of dollars.Because of the sovereignty issue when involving two currencies, Forex 
has little (if any) supervisory entity regulating its actions.