Paper Trading. Real Competition.
Join trading tournaments against live market prices. Build portfolios that settle at end-of-day NAV. Climb live leaderboards and compete for the top spot — it's all play money, so there's never any real-money risk.
Free forever plan · No credit card · Sign in with Google or Apple
Real prices, real strategy, zero risk. Trade stocks and crypto, run a fund, or host your own tournament.
Public arenas or private rooms with custom rules — shorting, margin, crypto, sector limits, and inverse scoring.
Spin up a portfolio with a ticker and a fee. Trade the underlying intraday; investors settle at your daily NAV.
Compete for Arena Credits, badges, and bragging rights. Pure skill, play money — no cash stakes, no risk.
Go long or short, add crypto, automate your decisions, or let AI scout the field for you.
Live crypto feeds let you buy and sell coins right alongside equities in any portfolio.
Bet against the market. Short positions, cover hints, and buying power — wherever the rules allow it.
Automate your strategy with rules that execute your trade decisions for you, hands-free.
Connect Claude, ChatGPT, or any agent to our MCP server and get live, interactive widgets right in your chat — a real trade ticket, stock chart, portfolio, and leaderboard — plus research and one-click trades.
Portfauxl.io hosts its own Model Context Protocol server with interactive widgets. Ask Claude or ChatGPT to "open a trade ticket" or "show me the leaderboard" and a real, clickable UI renders right in the conversation — search a ticker, size a trade with live fee/slippage/tax preview, and place it, all under your own secure connection.
Most sims fill any order at the exact quote, for free, forever — so luck wins. Portfauxl.io models the real cost and rules of trading, so skill does.
Brokerage execution fees, market-impact slippage on big orders, real sell-side SEC & FINRA pass-through charges, and capital-gains tax deducted at settlement — the whole cost of trading, not just the glamorous side.
Tournament directors and classroom teachers get real mandates: position-size caps, minimum-diversification rules, minimum holding periods, daily trade limits, forced end-of-period liquidation, no-crypto/no-short/no-margin toggles, plus sector, P/E and market-cap restrictions.
Sign up free with email, Google, or Apple. Start with 25,000 ARC instantly — no card required.
Buy stocks and crypto at live prices, go long or short, and shape a portfolio you believe in.
Join a tournament or season, climb the live leaderboard, and rack up badges and bragging rights.
Start free and upgrade as you climb. Every plan trades on real market data — the difference is how much you can build, compete, and host.
Get in the game
Build your book
Compete for the top spot
Host the action
All amounts are virtual Arena Credits (ARC). Portfauxl.io is a game of skill — no real-money trading, deposits, or withdrawals.
Join free, trade live markets, and find out where you rank. It only counts when someone's keeping score.
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