Internal and external markets, stock market terminology. The inner disk is usually represented by S, the outer disk by B, and the inner disk: the volume of transactions at the active buying price. The so-called active bid refers to the number of transactions in which the seller actively sells shares at a price lower than or equal to the current purchase price, showing the overall strength of the empty side. External disk: the number of transactions with active selling price in the volume. The so-called active selling refers to the number of transactions in which the buyer actively sells shares at a price higher than or equal to the current selling price, showing the overall strength of many parties. For example, the TMG platform in the United States is the outer disk, as well as Britain's FXCM and Yu Hui International. There is also a simple understanding that the internal market is a domestic foreign exchange transaction, and the external market is a trading platform for established financial countries such as Britain and the United States. However, at present, China's laws do not list foreign exchange speculation as illegal or illegal, that is to say, individuals are not prohibited from participating in foreign exchange transactions, so foreign exchange speculation has become a blank in China, which is neither legal nor illegal. With the internationalization of RMB, the foreign exchange market will open sooner or later.

In foreign countries, foreign exchange speculation is indeed legal, and there are also regulatory agencies similar to the CSRC, such as the Futures Association of the United States and the Financial Supervisory Authority of the United Kingdom, all of which supervise foreign exchange platforms to ensure their safety and legitimacy. Therefore, domestic investors can participate in foreign exchange transactions, but they must choose a supervised foreign exchange platform to ensure their property safety. Even if this platform is closed down or illegal, investors' property is supervised and safe.