Tech Terminal
Big tech stocks on a trading-terminal board: amber on black, a ticker tape, a command line, function keys, sparklines and 1D / 5D / 1M / 1Y charts. Inspired by trading terminals; not affiliated with any.
Live: https://techterminal.vercel.app
Default watchlist: NVDA, AAPL, MSFT, GOOGL, AMZN, META, AVGO, TSM (TSMC ADR), SKHY (SK hynix ADR), TSLA, SPCX (SpaceX), ORCL, plus SPY and QQQ for the S&P 500 and Nasdaq-100. Add or remove tickers from the command line; your list is saved in your browser.
Where the data comes from
- Without a key: quotes, charts and volume come from Yahoo Finance's chart data, through a small Vercel function (
api/yahoo.mjs) that caches responses at the edge (60 s for quotes, up to an hour for daily charts). It's an unofficial source and can change or be rate-limited without notice.
- With your own Finnhub key: press F6 (or type
KEY) and paste a free key from finnhub.io. Quotes and market caps then come from Finnhub, called straight from your browser. The key is kept only in that tab's memory: it isn't saved (no localStorage, cookies or server), isn't sent to this site, and is forgotten when you reload. To stop using it sooner, press F6 → USE YAHOO or type KEY OFF.
The site sends a strict Content-Security-Policy (vercel.json): the page may only run its own scripts and may only send data to itself and finnhub.io, so even a bug couldn't send a key anywhere else. Charts and volume still come from Yahoo, because Finnhub's free plan has no price history; non-US listings (like 000660.KS) always do.
Not investment advice.
Commands
| Type | Does |
|---|
AAPL ⏎ or AAPL <GO> | Show a ticker; add it to the watchlist if it's new (HYNIX, SPACEX, TSMC work too) |
DEL AAPL | Remove it |
1D 5D 1M 1Y | Chart range |
SORT PCT | Sort by PCT, CHG, LAST, VOL, MCAP (with a key) or SYM |
KEY · KEY OFF · HELP · RESET | Finnhub key · forget the key · help · default watchlist |
Keys: F1 help · F2 sort · F3 range · F4 add · F5 refresh · F6 Finnhub key · / command line · ↑ ↓ move through the list. On phones the function keys are buttons along the bottom.
Develop
No dependencies; Node 20+.
npm run dev # http://localhost:3000 (serves public/ and /api/yahoo)
npm i --no-save [email protected]
npm run brand # favicon set + share image (screenshot of the running app; needs Chrome)
public/ the page: index.html, app.js, style.css, fonts, icons
api/yahoo.mjs Vercel function → lib/yahoo.mjs (Yahoo chart data, validated and cached)
scripts/ local dev server and the brand script
Vercel serves public/ as static files and api/ as functions (vercel.json), with Vercel Web Analytics.
License
MIT. Fonts: IBM Plex Mono (SIL Open Font License).
