Whether you are an active options trader, investor, or just want to learn how options work, Option Crawler offers the easiest solution available, at an incredible bargain price. It provides complete stock option chains from Internet, calculates all standard option values including Theoretical Value, Percent to Double, Implied Volatility, the Greeks, Historical Volatility. Allows for easy building of option strategy by pointing and clicking on individual contracts from the displayed option chain. Strategies may be tested as to future prices and dates, modified, and then saved to a portfolio for continued monitoring and testing.