If you ever travel to another country, you usually have to find a currency exchange at the airport, and then exchange the money you have into the currency of the country you are visiting.
You go to the counter and saw the screen displays a different exchange rates for different currencies.
When you do this, you've essentially participated in the forex market! You've exchanged one currency to another currency. Or in forex trading terms, assuming you are an American visiting Japan, you've sold dollars and bought yen.
Before you fly back home, you stop at the currency exchange again to exchange the yen and notice the exchange rate has changed. These changes in the exchange rate that allows you to make money in the foreign exchange market.
The foreign exchange market, which is usually known as "forex" or "FX," is the largest financial market in the world
