Is it illegal to speculate in foreign exchange with mt4 or mt5? China doesn't have and can't have a formal foreign exchange trading platform, so it is illegal to use the British trading platform for trading. Software apps that individual companies engage in foreign exchange speculation, including some so-called big data, are deceptive. Without a legal business license, these companies are naturally illegal. If you are in the UK, you can use the UK trading platform. I'm afraid all China is a liar. The stock exchange in China is controlled by the State Securities Regulatory Commission, which can buy and sell stocks and futures, as well as conduct foreign exchange transactions. It is a formal platform of the country and will not be cheated.