SOL → SOLT Price Chart

Robinhood-style price chart that displays Solana (SOL) and Volatility Shares 2x Solana ETF (SOLT) prices side by side.

How the ratio works

The app calculates SOLT price = SOL price × ratio where the ratio is fetched fresh every trading day after US equity market open (9:30 AM ET).

Source	Data	Auth
CoinGecko	SOL price + historical chart	Free, no key
Yahoo Finance	SOLT quote (via server proxy)	Free, no key

The ratio is cached in localStorage so subsequent loads on the same day skip the fetch. After 9:30 AM ET on a new trading day, it automatically refetches.

If both APIs are unreachable, the app falls back to a hardcoded ratio from Jan 30, 2026 (5.41 / 117.18).

Run locally

npm install
npm run dev

The Vite dev server proxies /api/quote → Yahoo Finance automatically — no extra setup needed.

Deploy to Vercel

The repo includes a serverless function at api/quote.js that handles the Yahoo Finance proxy in production.

npm i -g vercel
vercel

That's it — Vercel auto-discovers the api/ directory and deploys the function alongside the static frontend.

Project structure

├── api/
│   └── quote.js          # Vercel serverless: proxies Yahoo Finance for SOLT quotes
├── src/
│   ├── main.jsx           # React entry
│   ├── SolChart.jsx       # Main chart component
│   └── ratioService.js    # Ratio fetching, caching, and SOL history
├── vite.config.js         # Dev proxy config
└── index.html

⚠️ Disclaimer

The SOLT/SOL ratio drifts over time due to daily 2x rebalancing, futures roll costs, and volatility decay. This tool provides estimates only — not financial advice.