The Fibonacci Retracement Rule

I just ran across this site where a floor trader from the Chicago pits says he learned about this 30 years ago.

He talks about the publication in 1202 of the "The Book of Calculation"

Not sure if that has anything to do with it or not, but his video is about Fibonacci numbers.

Fibonacci Retracement Rule - I have found Fibonacci numbers interesting for a while, I have read several books on them, but I have never been able to make any money with them. Not that it can't be done, I just have never been able to do it.

http://broadcast.ino.com/education/50rule/?we215