Option price calculator built in Excel, 5 inputs most traders skip

About this tutorial

Option price calculator setups inside Excel are one of the fastest ways to price contracts without leaving your spreadsheet, and this live session shows you exactly how to build one using MarketXLS real-time data. Whether you are evaluating calls and puts before earnings or stress-testing a covered call position, this demo gives you a working model you can copy and adapt today. What you'll see: - Pulling live underlying price, bid, ask, and implied volatility for any ticker using MarketXLS functions directly into Excel cells - Wiring the Black-Scholes inputs, spot price, strike price, days to expiration, risk-free rate, and implied volatility, into a clean calculator layout with no manual data entry - Using MarketXLS option chain functions to populate an entire expiration strip so you can compare theoretical value against the live market price in one glance - Calculating the fair value of both calls and puts and flagging contracts where the market price deviates from theoretical value by more than a defined threshold - Building a Greeks summary row, delta, gamma, theta, and vega, alongside each contract so you see the full risk picture, not just the price - Adding a simple scenario table that recalculates theoretical price across five different implied volatility assumptions so you can see how sensitive a position is before you place the trade Most retail traders open a brokerage options chain, pick a strike that looks reasonable, and place the order without ever checking whether the market price is fair relative to the underlying's current volatility. A live option price calculator solves that problem. When you can see theoretical value next to the live bid and ask in the same row, you immediately know whether you are paying a premium for implied volatility or getting a discount, and that single comparison changes how you filter trades. It also matters for income strategies like covered calls and cash-secured puts, where entering at the wrong implied volatility level can cut expected yield by a third or more before the position even opens. Having this model in Excel means you can screen multiple tickers in minutes rather than clicking through individual option chains one by one. The calculator built in this session also doubles as a monitoring tool. Because MarketXLS refreshes data automatically, the theoretical values update alongside the live market, so you can watch a position drift in or out of fair value in real time and act on it without switching applications. Built live in Excel with MarketXLS real-time data during this broadcast. Download the starter template and get your free MarketXLS trial at the link in the description.