Options Strategy Builder
Multi-leg payoff diagrams with Black-Scholes Greeks — free, no signup, runs in your browser. 10 institutional templates, real-time margin estimates, IV-driven pricing.
Legs (1)
Payoff at expiry
Debit $1,458
$24,084
-$2,916
$569.16
79.0%
log-normal estimate
$1,458
IBKR-style Reg-T
53.59
61.51
Aggregated greeks (per contract)
Delta
53.59
Direction
Gamma
1.167
Δ movement
Theta
-25.94
Per day
Vega
61.51
Per 1% IV
Rho
2258.80
Per 1% rate
Educational tool. All premiums estimated via Black-Scholes with the IV you provide — actual fills depend on the bid/ask spread, liquidity, and market microstructure at execution. Margin estimates are simplified IBKR Reg-T calculations; production margin uses portfolio margin and varies by underlying. Not investment advice.
How it works
From template to payoff diagram in 30 seconds
Pick a template
Start from one of 10 institutional templates — long calls, vertical spreads, iron condors, butterflies, straddles, strangles. Premiums auto-estimated from Black-Scholes with the IV you provide.
Tune the legs
Adjust strikes, quantities, sides, and premiums directly. Each leg shows live delta and a model-theoretical premium so you can sanity-check the mid before you trade.
Read the payoff
Visual payoff diagram shows profit/loss at any underlying price. Aggregated Greeks (Δ, Γ, Θ, V, ρ), breakevens, max profit/loss, POP, and IBKR-style margin estimate update in real time.
More tools coming
Visual. Mathematical. Free.
When Fulcrum Quant launches, the Strategy Builder connects to IBKR live chains — IV per strike, real bid/ask, and one-click order routing.