In his past, Haim Bodek ran a trading firm that accounted for more than 0.5% of all U.S. options trading volume. But then his trading programs turned south - and he couldn't identify why. That led him down a rabbit hole that led to the largest exchange fine in Wall Street history at the time. Now, Haim continues his quest to hold exchanges to account for unfair or deceptive practices. His story exposes a dark underbelly of Wall Street that every trader should know.