First of all, you need to know whether you understand margin trading. It's easy to know. In the real trading system, the first-hand transaction is $654.38+million. Then, in the margin leveraged trading system, dealers provide 1: 100, that is, 100K, or 1: 200 (200 K), 1:400(400K) for many retail investors who want to use small funds for foreign exchange. If you choose a lever of 200K, and each lot is 500 dollars, you can make 10 lots in Man Cang. But in fact, the required margin is obtained through the market quotation exchange rate X 100000÷ your leverage ratio. For your convenience, I supplemented my question with simple integers. PS: Market quotation is in the upper left window of MT4 platform, and the jump following K line is called real-time trading quotation.