For example: USD/yen is now 1: 130.1230, and the next second may be 1: 130.1234. Why do each currency change so frequently and change per second, and what is the exchange rate based on? Please be more detailed, thank you!
For example: USD/yen is now 1: 130.1230, and the next second may be 1: 130.1234. Why do each currency change so frequently and change per second, and what is the exchange rate based on? Please be more detailed, thank you!