The disadvantage of MT4 platform is that it is easy to disconnect, but the quotation is still relatively fast. The software is released by MetaQuotes Software Company, which provides free trial and has a Chinese interface. This software was written by Russians. Their talent in mathematics has been well applied in MT4 software, which is used in almost all CFD (Contract for Difference) of gold and foreign exchange. Because foreign exchange gold traders can use the loopholes in MT4 to operate, there is no problem with the platform of MT4, the first-tier company; Second-rate companies often drop calls, which seriously affects customer transactions.