OPTION SECRET VOLATILITY

GANNFOREXFINANCE, a well known volatility expert, explains in a very clear and progressive way the strengths and weaknesses of using options models. 
It covers why volatility is essential to options trading, what is exactly the differrence between historical implied and future volatility and how these concepts are essential to trading: no mythological or religious construction to follow blindly, just a plain clear explanation. Highly recommended for the professional trader as well as for the beginning one.