The foreign exchange market, or currency market, called Forex, is the most liquid market in the world, and it shows a lot of interest towards big and small operators because it can act both in Buy and in Short, and because it is open 24 hours a day (it only closes from Friday evening to Sunday evening). The foreign exchange market, or forex, has grown enormously in the last few years and every day thousands of operators all over the world are working there successfully, to meet their investment, hedging or speculation needs, based on consolidated rules and practices, without having to undergo all those restrictions that are instead systematically introduced on the stock and bond markets. In Forex Trading, buying a currency, speculation is made downward on the other currency, so it is possible to operate without any problem in a form of short selling. Being able to go even in downward speculation, the forex becomes even more interesting because the operator can operate exploiting operations both towards the ascent and to the descent of prices. The Forex therefore offers a bi-directionality, that is, the possibility of earning either upward or downward.