Let's assume that the price quoted by the euro is 1.3900/ 1.3903, and the difference in the fourth place after the decimal point is 3, and this 3 is the difference between the euro and the US dollar. Whether it's 1 lot or 0. 1 lot, the current price difference between Europe and America is 3 points. However, the amount of money to do 1 hand is different from that to do 0. 1 hand. In the case of doing 1 hand, one point is about 10 USD, three points are 30 USD, doing 0. 1 hand, one point is about 1 USD, and three points are 3. This is the relationship.