Exchange rates change all the time, and forex traders attempt to take advantage of these changes. Here’s a quick example:

Let’s say you travel abroad and you go to an exchange and use $500 to buy euros. After a week, you come back (without spending a single euro) and exchange your euros back to dollars – but you receive $505, because during the week, the exchange rate changed. This is a profit of 5 dollars, which you made by trading currencies.

Of course, nowadays you don’t need to leave the house to invest in the price of currencies – and you don’t even need to actually buy the currencies. Thanks to online forex trading anyone can invest in the price of different currencies from home - or even from their smartphone - and take advantage of changes in price.