Pick a contract from the chain
Data: Massive (Polygon) Options Basic, daily OHLCV bars only (2 years). Bid/ask, open interest and historical greeks aren't in this plan. IV and delta are computed here with Black-Scholes from the option's daily close and SPY's close (r=4%, q=1.3%; close timestamps aren't synced, so they're approximate). ▼ marks the selected chain date.