Domestic formal ones work as lower-level agents of traders, develop customers, and eat the "reverse commission" spreads given by traders. Unofficial traders learn from traders, first hedging internally, and then hedging their positions to traders. Domestic

So far, there is no real dealer, it is just an agent's business, just a sales outlet.

This is the basic profit model. If you can become a trader yourself, then you have to slowly explore the profit model. Each trader's risk-free profit model is the company's top secret.