Fibonacci works well with stock markets. But there are many crackpot stock systems out there for the masses - the masses who never get exposed to the working systems that are used within the industry. You can make ANY system work in the stockmarket as long as you address the most important aspects of the system: risk management, position size relative to risk and capital, exit strategy, entry conditions.
Most cheap, public, scam systems just harp on about entry points - as if that was the only thing, or the most important thing, or even a useful thing.
The first numbers in the sequence are great for working out. But hey, they are only missing the number 4, 6, 9, 10, 11 ! in the rep range that counts.
Pick a number under 10 and match it to appropriate sets and weights and wholah, progress. No magic involved.
Also, the DaVinci Code is a crock of shit. (pardon the language, it is just an expression)