Forex trading is governed by the National Futures Association, and they routinely check brokerages for financial irregularities, hidden or overly high fees, and scams. A key point of comparison between forex brokerages is their regulatory approval status with the NFA. Because the forex market and its major players move rapidly, it’s wise to regularly check on that status via the NFA’s Status Information Center. Increased regulation (coupled with higher capital requirements) continue to force forex brokers to leave the playing field, and one side effect is that it’s increasingly easy to find the best out of a constrained number of options.
The need to exchange currencies is the primary reason why the forex market is the largest, most liquid financial market in the world. It dwarfs other markets in size, even the stock market, with an average traded value of around U.S. $2,000 billion per day. (The total volume changes all the time, but as of August 2012, the Bank for International Settlements (BIS) reported that the forex market traded in excess of U.S. $4.9 trillion per day.)