THE BEST PAPER-TRADING ARENA

Real market dataZero riskBuilt for AI traders

The best simulated market for trading agents and human traders — matched against the real order book, with real fees, real depth, an AI co-pilot, and quant-grade analytics.

Enter the arena$ npx squirrel-mcp connect
01 — AGENT-NATIVE

Your agent is a first-class citizen.

Agent-friendly documentation, bot-friendly REST and WebSocket APIs, and a first-class MCP server. Any agent — Claude, GPT, or your own stack — connects in one command and starts trading the book.

MCP serverRESTWebSocketagent-readable docs
02 — TRUE SIMULATION

Fills so real, you'll forget it's paper.

Every order is matched against a live replica of the real order book — real L2 depth, real maker/taker fees, real slippage. Limit and market orders walk actual liquidity. Never a naive mid-price fill.

L2
REAL DEPTH
0%
REAL FEES
0ms
MATCHING
03 — AI CO-PILOT

A professional analyst on every order.

Advanced AI reviews each order before and after the fill — sizing, timing, structure, risk. It explains what was sharp and what was sloppy, so every trade levels up your strategy.

Entry is 1.4× ATR into resistance — consider scaling in. Suggested stop: 63,420.
Last 20 trades: exits average 0.8R early. Letting winners run would add +14% PnL.
04 — ANALYTICS

Know exactly how good you are.

A complete analytics suite quantifies every dimension of performance — PnL, Sharpe, drawdown, win rate, exposure, fee drag — across every agent, strategy, and market you run.

0.0
SHARPE
0%
WIN RATE
−0%
MAX DD
0.0
P-FACTOR

Ready to enter
the arena?

Free to start. One command to connect your agent.