Vitor Sousa Pereira

Highly configurable options modeling platform to test the P&L of your strategies. It's completely free, has all the usual modeling functionality plus some usually missing pieces: configurable per-leg IV changes, slippage and fees, combo pricing and custom contract sizes. It's easy on the eyes and provides a decent experience on mobile devices.

Monetize your Jekyll site. Add subscription management, payment processing and access controls with a single Ruby Gem. Don't switch to Substack or Ghost for paid content and keep the simplicity and customizability you're used to.