True King Games
One person building trading tools that don't flatter you.
Prop Desk — Day Trading Simulator
Load a real recorded market day, step it forward one candle at a time, and trade it by hand without ever seeing what comes next. Not a backtester, not a paper account — a replay you play. Free in the browser, no download, no signup.
Built solo in Godot 4.6. The first full build lands September 11, 2026.
What I'm working on now
- More symbols beyond AAPL
- A spread and slippage model, so fills stop being kinder than a real broker's
- Filling out the challenge system
If you play it
Bug reports are welcome, and so are the ones where a rule you were sure about came back rejected. Leave them in the comments on the game page or in the devlog thread.
Why I built it — the longer writeup
Mailing list — one email the day the full build is ready, and nothing else, ever.
Prop Desk is a trading simulation that runs on historical market data. Not investment advice, not connected to any broker, no real money at any point.
