 After the trial-period ended, he gave the few of them who had successfully traded the system during the one-month trial, accounts ranging from $250,000 to $2 million of his own money to manage.When his experiment ended five years later, his Turtles reportedly had earned an aggregate profit of $175 million.The exact system taught to the Turtles by Dennis has been published in at least two books and can be back-tested to check its performance in recent years.