1. If you can exchange it at the weekend in China, just go to the bank. As for foreign countries, it is not clear.
2. Bank foreign exchange quotation is different from margin quotation.
Margin quotation is the price traded in the foreign exchange market, which changes from time to time and fluctuates greatly. Bank quotations are converted according to the foreign exchange market, which will of course be affected by the foreign exchange market price, but it is not as fast as the foreign exchange market. So the second question is that your own ideas are basically ok.
3. Currency exchange is not simply divided into two parts and three parts. Individuals or governments such as import and export trade and government loans need to exchange foreign currency. These exchange processes require financial institutions such as banks as transit agencies. Some of these exchanges are clear. If you go to the bank to exchange money, you can see the exchange process, but some exchanges can't see the direct exchange process.
4. Trading on the margin trading platform cannot be said to be as simple as a bank or platform. According to the type of platform you choose, it is composed of banks, platforms and other investors. This process is not as simple as imagined. Every day, trillions of dollars of transactions are completed through the now perfect financial system. The spread is collected by the platform as an intermediary service fee for banks, individuals, enterprises and other people who need to do foreign exchange guarantee business.
5. The difference is due to the transaction price of the day.
The foreign exchange margin business is not as simple as you think, but related to the exchange of foreign exchange at the bank counter. It has something to do with many aspects. The economic operation of the world needs currency exchange in many aspects. Currency exchange will affect the exchange rate, and many exchanges are not for exchange. For example, when some places are affected by disasters, China loves to do so, giving N billion yuan in aid. The money will eventually be converted into local currency, and it is impossible to send RMB to every victim. This process also involves currency exchange, which will also have an impact on the money market, but the impact is minimal.
Don't think too much.
If you want to do foreign exchange margin business, then learn technology. I like to think so much, so I can look at the data of fundamental analysis again.