It can be seen that you should not trade by yourself. In fact, you will know by downloading a simulation disk, which is the same as the real discount.

USD/JPY can go up or down. In the case of buying up, if the yen rises, the dollar will lose money against the yen, and you will lose money.

As for the first-hand security deposit, the first-hand US-Japan contract is 654.38 million US dollars. If you don't add leverage to buy one hand, it will cost 654.38 million+US dollars. However, brokers usually provide leverage of 654.38+000 to 400 times, and dividing the leverage by $ 654.38+ 10,000 is the margin you need to do it first.