PrediEdge

What it is

A web app that watches Polymarket fills as they print and keeps the large ones. The default view, the Whale Tape, lists every trade of 1,000 USD or more over the last 24 hours, refreshed every 15 seconds; on 30 September 2026 it held just under 2,500 rows. Each row carries the market, side, notional, price, share count, the trader's Polymarket display name or address, and, where the trade moved the book, a tag for how far.

The tags are the one piece of method you can read out of the app's code rather than take on trust, and they are plain price arithmetic on the outcome that traded: SHIFT for a move of at least half a cent, MOVE from one cent, IMPACT from two, SWEEP from four ("swept through levels"). A row with no tag moved the price by less than half a cent. A "Close" marker flags a sell that exits a position.

Around the tape sit three more screens:

• Whale Moves - large trades on outcomes priced under 30%, headed "Potential Insider Activity" with a running count of how many it has flagged. It needs a free account.
• Topics - a keyword or condition-ID filter that pulls a set of markets into one flow view. Creating one needs an account; the one public example on 30 September 2026 was still the Super Bowl LX topic from February.
• Sentiment - flow grouped by category.

Presets on the tape (Whales, 10K and up; Recent; Political Buys; Sports) and filters by amount, time window up to 30 days, category, side and a noise switch that hides trades above 99% make up the screening. A wallet can be added to a watchlist with its own minimum size.

Several more views exist in the app's code and are switched off: a Leaderboard and a Heat Map marked "coming soon", and a Curated Feed, a Signals page and a Kalshi Market Signals page marked new but not shown. None of them is on the card, because none of them is reachable.

Availability

Nothing to deposit, nothing to trade, and no geographic restriction in the terms, which are governed by Delaware law and were last updated in November 2025. The tape and the Topics list render with no account. An account is an email address or Sign in with Apple, with a username and password; there is no identity check. The privacy policy says the service is not meant for children under 13.

us_persons is true because nothing in the product or its terms turns a US reader away. What every row on the tape describes is a trade on international Polymarket, which does not serve US persons, so a US reader can watch this flow and cannot act on it there.

Pricing

Free, with no pricing page. The landing page's navigation still carries a Pricing anchor that leads nowhere, and the page's structured data lists a single offer at 0.00 USD. In the app, the "Alpha" and "Unusual" presets carry a PRO badge, and the button behind them goes to the free sign-up form. The app's authentication provider answered on 30 September 2026 that billing is not enabled for this instance.

That is what the product is today, not a commitment.

There is no trade and no fee on one, so the fee fields read "None".

Markets & resolution

It lists nothing and resolves nothing. Every market, price and payout is Polymarket's, settled under Polymarket's rules and its UMA oracle process; PrediEdge adds a filter and a label on top of the fills.

The Kalshi claim needs reading closely. The legal notice says the service integrates with Kalshi, and the tape has a platform switch with Kalshi in it. On 30 September 2026 a seven-day query of the tape restricted to Kalshi returned zero trades and the Kalshi signals endpoint returned an empty list, while the unfiltered 24-hour tape was entirely Polymarket. That is why cross_venue is false here.

The landing page's counters - 20 million USD of volume tracked daily and 500-plus active markets - are the vendor's own, and its demonstration panel still shows a 2024 election market and a July date.

Integrations

None published: no documented API, no SDK, no export, no Telegram or email delivery. The app is built on its own JSON endpoints, which answered without a key on 30 September 2026; they are not documented, carry no stated terms of use beyond the site's, and the terms forbid scraping. The one export is a PNG snapshot of a flagged trade for sharing.

Limitations

"Insider" is a label for size at long odds, not a finding. The Whale Moves screen counts large trades on outcomes under 30%, and the app prints its own caveat beside the count: the heuristics flag unusual patterns and are not a confirmation of insider trading. A large buy at 20 cents can equally be a hedge, a market maker, or somebody who is simply wrong.

The price-impact tag is not a quality score. It says how far one fill moved one outcome's price. On a thin market a 1,000 USD order will tag as a SWEEP, and on a deep one a much larger order may tag as nothing.

The operator is unnamed. The terms and the legal notice name PrediEdge, Delaware law and a support email, and no company. Account and support questions have nobody named behind them.

Data is supplied as-is. The legal notice says market data comes from third-party APIs and may be delayed or wrong, and disclaims accuracy, completeness and timeliness.

The finished-looking surface is smaller than the code. Five of the nine views in the app are hidden or marked "coming soon", and the landing page still carries a 2025 copyright line. What is live today is the tape, the longshot screen, Topics and Sentiment.

One venue in practice. See Markets & resolution for what the Kalshi switch returned.

Alternatives

Polytrack at polytrack.cash does the same job - flag unusual Polymarket trades and grade them - for a subscription, and publishes separate methodology and limitations pages that PrediEdge does not have. Polysights runs its own insider-finder screen, free and equally unexplained.

For the wallet behind a trade rather than the trade, OrcaLayer publishes its exclusion rules, and Polymarket Analytics and Predicts.guru are free to browse. For the same flow as data you can build on, DepthFeed sells the series.