Pick a contract, drag the date and price sliders — profit or loss at any price on any date, drawn as a heatmap. Quotes come from the live option chain.
Convention: P&L is shown per contract (100 shares) — the real-money number; prices are per share. Quotes use the chain’s bid/ask midpoint; real fills are usually a bit worse.
Model: Black-Scholes with a zero risk-free rate, holding IV constant across the whole grid. In the real world IV moves with time and price (especially around earnings), so the far corners are the least reliable.
Data: CBOE delayed quotes (~15 min). For education only; not investment advice.