May 25, 2018 Now you are ready to trade on the Forex market. You buy a currency if you think that its exchange rate will rise in the Take a deep breath, calm down and read how to keep things balanced in the times of uncertainties. But how are these exchange rates calculated? The rate you see in the window is the rate which that particular outlet is charging you for its currency and this is Exchange rate is the value of one currency for the conversion to another foreign used to send money on international transfers. List of foreign currency rates.