Full Black-Scholes pricing engine with all five Greeks per leg and net position. Ten prebuilt strategies. Interactive payoff diagram with expiry and current-value curves, breakeven markers, and probability-of-profit. Pure client-side math — no API.
| Leg | Δ Delta | Γ Gamma | Θ Theta/day | ν Vega/1% | ρ Rho/1% |
|---|---|---|---|---|---|
| Select a strategy and click Calculate. | |||||