Forex, which is an abbreviation for the phrase “foreign exchange,” has to do with the accurate and timely calculation of the rate of exchange between any two national currencies. Forex impacts the lives of a number of persons daily. Here are a few examples of how forex works in various scenarios.
Forex refers to the biggest, freest marketplace in the world: the global trading of different nation's currencies or money. Dollars, euros, pounds and yen are all examples of currencies. If you live in a country that counts money in dollars, then euros are foreign currency to you. If you want to pay dollars to someone who uses euros, the two you will have to engage in foreign exchange, or forex.
It's elementary supply and demand. If I have lots of dollars and few euros, your dollar is worth only a small number of euros to me; perhaps only a fraction of a euro. On the other hand, if I have a shortage of dollars (and need them to pay someone else), then I will give you more euros for your dollar. If we can negotiate a mutually agreeable exchange rate - X dollars for Y euros - then we can do business.