Forex or FX is short for "Foreign Exchange" and is called in German currency. Consequently, the FX market or the forex market is the market where the foreign currencies are exchanged.

So, as adopted, see that the American economy was on the ground long enough and you believe that there is currently sufficient evidence to suggest that the U.S. faces an economic upswing. Since you want mitmischen perhaps, best in the real estate market, because promises a good return. So you want to buy something. Thus in the U.S. but you can go on a shopping trip, you need dollars. Consequently, you exchange euros for dollars. The result is: The dollar goes up, the euro down, at least in theory. And if