Thanx, Duster, my client let me go home early today, so I could do some trading at the last 15 minutes before closing. you can read the following article, pretty useful tool! <A HREF="http://www.ivolatility.com/news/Putting_volatility_to_work.pdf" target="_blank">http://www.ivolatility.com/news/Putting_volatility_to_work.pdf</A>