Option Visualizer

Visualize options positions and analyze P/L scenarios. Upload a screenshot or enter positions manually.

Quick Start

# Backend
cd backend
cp .env.example .env  # Add your API keys
uv sync && uv run uvicorn main:app --reload --port 8000

# Frontend
cd frontend
bun install && bun run dev

Open http://localhost:5173

Environment Variables

Backend (backend/.env):

• GEMINI_API_KEY - Google Gemini API key for OCR
• TASTYTRADE_CLIENT_SECRET - Tastytrade OAuth client secret
• TASTYTRADE_REFRESH_TOKEN - Tastytrade OAuth refresh token

Optional:

• GEMINI_OCR_MODEL - Gemini model for screenshot OCR (default: gemini-3.1-flash-lite; use a Flash model if accuracy matters more than cost)
• GEMINI_OCR_MAX_DIMENSION - longest image side sent to Gemini for OCR cost control (default: 1024)
• DEFAULT_RISK_FREE_RATE - Override default risk-free rate (default: 0.045)
• DEFAULT_IMPLIED_VOLATILITY - Override default IV (default: 0.25)
• MARKET_DATA_CACHE_MINUTES - Cache duration in minutes (default: 30)

Features

• Screenshot OCR (Google Gemini AI)
• Interactive P/L charts with breakeven analysis
• Real-time market data (IV Rank from Tastytrade)
• Dark/light mode

Tech Stack

• Frontend: React + Vite + TailwindCSS + Recharts
• Backend: FastAPI + Python
• Data: Tastytrade API (IV Rank), Yahoo Finance (prices)