In 1997, one of the largest stock-trading floors in the United States began offering daily coaching sessions to improve the results of a team already averaging about a half-billion dollars’ worth of transactions a day. Within four years, what was a training program for professionals became an educational tool for aspiring traders of all stripes. Through the Internet and a network of visor-wearing messenger pigeons, the academy now serves financial go-getters from across the country with classes, remote coaching, and vital tools for modern moneymaking.