Asuming you have prior knowledge of a major event that will move currency, and you act on that, making a large profit, how would you be tracked down? Isn't the forex market decentralized? You can't even get the volume for any given day, much less who made the trade connected to a certain volume. Not only that, but there's also so much money sloshing around the FX market that a 2 million dollar inside trade would hardly raise an eyebrow. Hell, couldn't you short the dollar, blow up the Empire State Building, take your profit, and never be tracked down? Is FX the perfect market for shady dealings? Oh, and given the insane leverage offered, doesn't that make it perfect for someone making a rigged bet?