Forex trading is all about making big profits, just tons of money to be totally blunt. As some investors have found, it quite simple to make a vast amount of money since the forex(foreign exchange) market fluctuates daily just like the stock market does. The Forex system is able to be traded online by a private investor such as yourself, or through your bank just as you would be able to invest in a mutual fund or stocks.
Brokers love selling people this at the bank due to the huge commissions.
If you are seriously thinking about getting involved in the Forex markets you should be aware that essentially your money is being invested in foreign countries. The forex market allows you to have your money invested in one country one moment, and another on the next trade all in one market one day. As one countries currency value increases, you can sell at a profit and move it immediately to another country, this is how profits are made as this process is repeated.