How could a band of physicists in sandals and Eat the Rich T-shirts hope to take on the leading lights of high finance? They had never even read the Journal. But they did know that global finance is an irrational, complex system bordering on chaos. Since two of them, Doyne Farmer and Norman Packard, happened to be among the founders of the new science of chaos and complexity, perhaps they could give it a try. Now, several years - and many millions of dollars - later, they continue one of the most significant winning streaks in the history of Wall Street.