The advantage is simple: It keeps the money flowing around the world.
A more complex answer would involve the exchange of goods and services, comparative value and advantage and some other rules...
The spot exchange rate refers to the current exchange rate. The forward exchange rate refers to an exchange rate that is quoted and traded today but for delivery and payment on a specific future date.
The foreign exchange market is the made up of 2 components. First the Spot rate. This is the exchange rate at the present time. The spot rate on FX changes every second and is constantly updating....