Option Exchange (OE) is an easy-to-use options calculator that applies the Black-Scholes model. This is a free application from iVerit, a provider of real-time U.S. equity and index options market data and analytics referencing the Options Price Reporting Authority, with updates as frequent as every 3-seconds. OE is a low-cost way to begin to experience applications by iVerit Inc. Two other applications provide the real-time market data; Option Exchange Market Data (OEmd) and Option Grid (OG"). Option Exchange calculates implied forwards, implied volatility, and analytics (known as the greeks); delta, gamma, vega, theta, and rho. OPTIONS-IMPLIED FORWARDS reflect the markets view of dividends, interest rates, and borrow rates on the underlying. You no longer need to estimate dividends, nor find borrowing costs. OE uses the options implied-forwards, that is why you enter a price for BOTH the call and put. NO SCREEN FLIPPING, everything you need, inputs and outputs viewable on a single screen. MANUAL OVERRIDES, enter your own view of quoted option prices, or custom expiration date, strike, or interest rates.