# Skewpoint

> Skewpoint is a free web app for crypto options analytics on Bitcoin (BTC) and Ether (ETH): a live implied volatility surface, a vanilla and exotic option pricer with Greeks, portfolio valuation of an options book uploaded from Excel/CSV, and risk analysis (spot-vol grid, barrier ladder, historical-simulation VaR and Expected Shortfall). Built by Mikhael Farouz, a crypto options practitioner. Access is free and granted instantly on request.

- App: https://volsurface.sites.tab.bot/
- Get free access: https://volsurface.sites.tab.bot/request

## Pages

- [BTC & ETH option pricer](https://skewpoint.io/btc-eth-option-pricer/): crypto option pricer for vanillas, multi-leg strategies (risk reversals, strangles, straddle, spreads, butterflies) and exotics — knock-in/knock-out barriers (regular and reverse), one-touch, no-touch, double knock-in/out, double no-touch, double one-touch, European digitals. Black-Scholes on the live SVI-JW surface; exotics with closed-form TV and vanna-volga MV. Greeks: Delta, Gamma, Vega, Vanna, Vomma. Strategy assistant in plain English or French with goal seek.
- [Crypto options portfolio valuation](https://skewpoint.io/crypto-option-portfolio-valuation/): upload an Excel/CSV book of BTC and ETH vanillas and exotics (template provided); automatic split into a BTC book and an ETH book; M2M, PnL, Delta (coin and cash), Gamma, Vega, Vanna, Vomma, 1-day Theta; vega buckets by tenor (1D, 1W, 1M, 3M, 6M, 9M, 12M) summing to book vega; premiums in USD, BTC or ETH; CSV export.
- [Crypto option risk analysis](https://skewpoint.io/crypto-option-risk-analysis/): full revaluation of the book under a spot × vol grid (spot −50% to +50%, vol −15 to +50 points; value/P&L, delta, vega), a barrier ladder (distance in % and sigma, PV at barrier, jump on touch), and 1-day historical-simulation VaR 99% and Expected Shortfall 97.5% over 3 years (1,095 daily returns).
- [Bitcoin & Ethereum implied volatility surface](https://skewpoint.io/bitcoin-volatility-surface/): live BTC and ETH smiles by strike and delta (SVI-JW calibrated on option mid prices), ATMF (delta-neutral straddle) term structure, standard tenors 1D–12M, 25Δ and 10Δ risk reversals and butterflies, historical realised vol 1D–12M, IV vs RV with stored daily snapshots.

## Key facts

- Underlyings: BTC and ETH options.
- Pricing: live market data; SVI Jump-Wings calibration per expiry; tenors interpolated in total variance at constant delta.
- Price: free (access on request, approved instantly).
- Runs in a web browser on desktop and phone; portfolio files are read in the browser.
- Indicative analytics, not investment advice.