Polymarket Paper Trading

A paper desk needs realistic fills, realistic labels, and zero risk. The recorded archive supplies all three: fills priced at the executable side, outcomes as ground truth, and nothing at stake beyond curiosity. The ticket your paper strategy would have taken is a replay query.

The honest framing: paper trading on the venue means paper-trading the record — the venue itself has no sandbox for outsiders, so the archive is the simulator. (sandbox and demo data pages cover the API side.)

Paper trading removes capital risk, not judgment: your paper desk printed decisions you could take for real, and the honest difference at real size is slippage against the bound's ~42,254-share median rest plus the times you cannot get filled (16.9% one-sided frames).

The gap is the product of the slippage and capacity pages — paper first, cost-then, capital last.

Paper-trade one week of 5-minute BTC windows using an anchor-join rule, executable-side fills, and the outcome column. The runbook produces decisions, fills, and settlement — a practice audit trail with no funds exposed.

If the paper system cannot survive its own recorded re-run, the real one is not ready — order of operations that never risks USDC.

• Demo data
• Sandbox API
• Fill simulation