To calculate historical volatility in excel, start as you would normally. Make sure your book has a title. You will want to type in your data and create a table from it. There are many different variables that need to be considered. You will need to create these variables which will allow you to create a formula. Using this formula you will be able to calculate your historical volatility. For
. examples and visual aids go to http://www.power4xl.com/black_scholes/functions/historical_volatility.html