I would say its Derrick Hobbs. "Fun with Fibonacciis"
Derrick Hobbs is probably the best trader alive today. He is available now on EliteTrader to speak with if you have questions. He is commonly seen at TradingMarkets where he takes time out of his busy trading day sells material to many people for only 300 bucks per lesson and he has an awesome letter that I personally subscribe to that only costs 150 per month. I wouldnt think of trading without it. This is not a plug in anyway for Derrick Hobbs..but I would go out and buy this book immediatly before it sells out!