Online forex trading occurs all around the globe. From Monday to Fri it is always business hours somewhere, so trading can occur twenty-four hours a day, 5 days a week. The market is open, in reality from 4 pm EST Sun to four pm EST friday. You can get online evenings or early mornings instead.
To explain this, we have to consider Unstoppable Forex Profit. Forex trading is always an exchange of one currency for another. You are purchasing cash, and the only real way you can do that is to give another type of cash whose relative price will change. This implies that you can trade in either direction, going long or going short. While this is often done in some sorts of stock trading, it is constant and therefore much more available in online forex trading. Maybe it is simply because stock movements are less endemic, relying more on company policy and inside knowledge than technical research. In any case, this could actually be one of the benefits of online foreign exchange trading.