Every aggregate statistic CopyGrade publishes, on one page — from our own scored-wallet dataset and the independent research we cite, each with its source and date. Free to quote with attribution and a link — hit Cite on any number for a ready-to-paste citation with a deep link back to it. Snapshot: October 2026, last updated September 30, 2026; figures move as coverage grows and the model is recalibrated in public.
Copyability is the degree to which a trader's historical edge could realistically be captured by a follower — after fees, latency, and the behavioural patterns that exploit copiers. The index is the share of all graded wallets currently clearing CopyGrade's canonical copyable bar, defined exactly in the first row below; the dated report sections further down use each edition's own funnel wording, so read every number with the definition beside it. Figures are as of the latest scoring pass (October 12, 2026) and refresh hourly. The index is a level, not a trend: the model recalibrates in public, so movement over time can reflect model changes as well as market ones.
The Polymarket Copyability Index stands at 1.4% as of October 12, 2026: 179 of the 12,844 Polymarket wallets CopyGrade grades currently hold a positive verdict with a clean farming check, a positive realistic post-fee edge, and at least 20 trades in the last 90 days.
CopyGrade's live scored set covers 12,844 Polymarket wallets as of October 12, 2026, re-scored from public trade history on an hourly sync.
35.0% of the 12,844 Polymarket wallets in CopyGrade's live scored set carry a farming-risk flag as of October 12, 2026 — an algorithmic risk assessment, not an accusation of conduct.
24.1% of graded Polymarket wallets (3,094 of 12,844) currently carry a severe, high-confidence farming flag as of October 12, 2026.
The median CopyGrade Score across all 12,840 graded Polymarket wallets is 48 out of 100 as of October 12, 2026 — the live counterpart of the dated October 2026 report figure below, over the larger current set.
The median graded Polymarket wallet has a realistic post-fee edge of -1.4% as of October 12, 2026, across the 12,840 wallets in CopyGrade's live scored set that carry a computed edge — before a copier adds slippage or latency.
From 11,721 actively-traded wallets scored by the CopyGrade Score model in the October 2026 snapshot.
CopyGrade's October 2026 snapshot scored 11,721 actively-traded Polymarket wallets from their public trade history.
35% of actively-traded Polymarket wallets carry a farming flag, and 24.2% carry a severe, high-confidence one.
The median active Polymarket wallet has a realistic post-fee edge of -1.4% — negative before a copier adds slippage or latency — and 77% of wallets are negative outright.
Only 155 of 11,721 active Polymarket wallets (1.3%) pass every test a copier should apply: enough history, a clean forensic record, a real post-fee edge, and a CopyGrade Score of 75 or higher.
The median CopyGrade Score across active Polymarket wallets is 48 out of 100, and 56.1% of wallets score below 50.
The 191 wallets on Polymarket's public profit and volume leaderboards, scored with the same model.
61.3% of the 191 wallets on Polymarket's profit and volume leaderboards are farming-flagged (44.5% severely) — a higher rate than the wider active population.
None of the 191 Polymarket leaderboard wallets is worth copying by CopyGrade's full vetting bar at this snapshot — zero, against 1.3% of the population the board was skimmed from.
The median Polymarket leaderboard wallet would hand a copier a -18.9% realistic edge after fees, slippage, and latency — despite topping a raw-profit ranking.
Estimates from an independent Columbia University working paper — algorithmic classifications, not audited figures.
A Columbia University working paper estimates roughly 25% of Polymarket's all-time trading volume is consistent with wash trading.
The same study flags 14% of the 1.26 million Polymarket wallets it examined as wash-trading participants.
Estimated wash share varies sharply by category: roughly 45% of Sports volume, 17% of Elections, 12% of Politics, and 3% of Crypto.
CopyGrade figures are computed from public Polymarket trade history by the CopyGrade Score model and published in dated report editions; they are our documented opinion, recomputed as coverage grows. Scores are graded against realized forward outcomes — the live band-by-band results are on the track record. The wash-trading figures are the cited authors' estimates from a working paper. To cite the whole page: “CopyGrade, Polymarket copy-trading statistics, October 2026” with a link; to cite a single number, use its Cite button for a paste-ready line with a deep link back to it. For the analysis behind the numbers, start with how to vet a Polymarket trader or the graded leaderboard. CopyGrade is analysis-only — it never executes trades or holds funds. Not financial advice.