If you trade options or want to learn option trading, you will find following tool very useful. It is web based, and it is free.
Option-Calculator is a useful tool that calculates implied volatilities,
fair values and Greeks of American-style options for option traders, using
20-minute delayed market data. It also provides covered call analysis, Max
Pain analysis, and multiple direct links to other websites so that users can
do stock research and market analysis conveniently.
Go to http://www.edgeinvestor.com
click "Launch Option-Calculator"
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