The Foreign Exchange (FOREX) Market is the world's largest financial market. The two sides of the transaction are made by telephone and electronic trading system, and the time difference will closely connect the business hours of the foreign exchange exchanges around the world, so that the transaction will be no more than 24 hours.

Market fluctuates due to economic, political and social events. The risk of investment between closed and open markets may be relatively low. The factors that affect the foreign exchange market are very broad, so the foreign exchange market is difficult to be manipulated. The participants in the market have banks, governments, institutions, and so on, so the liquidity of the foreign exchange market is extremely high.

Many institutions in the world trade 24 hours a day, so there is an overlap of trading time between the two places: