The Turtle System is NOT Dead and is definitely still effective. I have been trading it for several years successfully. This last year I've made over 200% in the forex market. Currency happens to be the best market to trade the turtle system because it is very liquid and tends to trend a lot.
You can find a very nice Expert Advisor for Metatrader here:
Turtle Trading: Automated Forex Software
And whoever said that the system was made ineffective because many people traded it is wrong in my personal experience. The more people that trade this system the MORE effective it becomes.
Happy Trading