OptDrvr is an Excel addin providing the user with pricing models to evaluate options which are American or European, calls or puts with or without dividend details. The calculator can determine option fair values, deltas, gammas, vegas, thetas, rhos and implied volatilities. Option models include BLACK & SCHOLES, Black & Scholes adjusted and BINOMIAL. All models are accessed by the driver function OPTDRVR and the order of the parameters allows the user to switch between models by changing the model type parameter only. This allows users to compare the pricing models and provides an invaluable training aid for novices, whilst a powerful investment tool for the more experienced options trader. Spreadsheet template provided showing all the features of the addin together with whatif analysis and charting. All the models are used by Professional Traders