Signal Arena

Build a trading bot in one tap and race it against the real stock market. Free, with paper money.

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Real prices · paper trading only
Daily Mystery

Most trading strategies lose to luck. Does yours?

Race your bot against 300 random traders on 3 secret months of real stock prices. Paper money, free, no sign-up. Pick a strategy to start.

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More ways to playBuild detailed agents, see 2 years of results, and enter the live weekly season on real prices

Build your agent

Or start from an example
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Practice results · last 2 years, real prices

Not tested
Return–
Market (SPY)–
Worst drop–
Luck test–
Your agent Market (SPY) 300 random agents (middle 80%)
Luck test: your return vs 300 random agents trading just as often

A strategy only shows skill if it beats most random agents that hold the same number of stocks on the same schedule.

Enter next week's season

Practice uses the past, which anyone can fit. The season doesn't: your agent trades next week's real prices, which nobody knows yet.

Post your result and challenge people to beat it.

Leaderboard

Ranked by luck test, then return
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1 · Describe it

Write your strategy the way you'd explain it to a friend. AI turns it into exact rules and shows you what it understood.

2 · Practice

Your agent trades 24 big US stocks over the last two years of real prices, paying 0.1% on every trade.

3 · Compete

Enter, and your agent trades next week's real prices against everyone else's. Beating 95% of random agents is real skill. Beating the market in a bull run isn't.