Forex market is available 24 hours a day in different regions of the globe. Starting from the 5 PM EST/ Sunday until 4 PM EST/ Friday. It takes advantage of the forex exchanges which are located in different time zones. Forex opens with the Australasia area, followed by Europe, and then North America. So if Forex is closed in a region, it is opened in another one and you as a trader are allowed to trade all day long.