Foreign exchange or Forex trading, forces influence currency price movements. These forces are accepted by economists around the world as responsible for changes in the value of currencies. The person learning to trade forex or trying to improve his or her trading will benefit from a gain of knowledge of these fundamentals. In fact, as you will see, fundamental forces act as leading indicators of currency movement. U.S. and global interest rates, economic growth, and market sentiment toward the dollar are the key ingredients that shape trading opportunities.