End date
Nov 5, 2026, 00:00 UTCNov 5, 2026, 00:30 UTCchanged from Nov 5, 2026, 00:00 UTC to Nov 5, 2026, 00:30 UTC
Polymarket and Kalshi, recorded for 4 days
Know when a market you hold changes its rules.
Polymarket and Kalshi edit the rules of markets people already hold, and neither tells the holders. RulesWatch keeps a copy of the rules of 105,609 markets, rereads them all day, and shows the words that changed, when, and what the price did. Watch your markets and you get a message on the next check.
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Latest editPolymarket
Rules+21−3
17 words reported by Nasdaq Private Market, LLC (NPM) for any date between market creation and December 31, 2026,reaches or exceedsis equal to or beyond (equal to or above for ↑ HIGH valuations, equal to or below for ↓ LOW valuations) the listed amount. Otherwise, this market will resolve to "No". NPM Prices are published for trading days 377 words
Open the full diff+21 −3 words
Markets tracked
105,609
29,164 Polymarket, 76,445 Kalshi
Last check
a new check every 5 minutes, day and night
Changes recorded
83
17 to rules text or source, 18 disputed outcomes, 46 moved dates, 2 renamed markets
Edits in the last 24 hours
27
across 25 markets; recording since Oct 31
Latest edits
Newest first. Each one has its own page with the changed words.
- Dates changedRainbow Six Siege: Honvéd vs Fans of Attics (BO3) - EML Challenger Circuit Playoffs
- Dates changedCounter-Strike: UNiTY esports vs Thousand (BO1) - MČR Group A
- Dates changedCounter-Strike: Prestige vs maybe (BO3) - CCT Europe Closed Qualifier: Series Group B
- Dates changedWill KV Kortrijk win on 2026-10-23?
- Dates changedRainbow Six Siege: Honvéd vs Fans of Attics (BO3) - EML Challenger Circuit Playoffs
- Dates changedDota 2: Cooman Team vs Stray Team (BO3) - Media Eleague Group Stage
Follow along: RSS, clarifications and rules edits · RSS, every edit · this week's report. Your own markets get a private feed once you start a watchlist.
Why it matters
One clarification, $3.8M of positions cleared
On June 1, 2026 Polymarket added a clarification to its MicroStrategy market, which had traded about $175M. It tied the outcome to the date a purchase was disclosed. The top Yes holder lost about $500,000: "It was not written down on the market." In the same dispute, a clarification after settlement cleared about $3.8M of Yes positions across 1,838 accounts. Nothing told the people holding it.
Sources: DeFi Rate, KuCoin News, Polymarket's help page on clarifications.
$500Klost by the top Yes holder
$3.8Mof Yes positions cleared
1,838accounts affected
Every edit, on the price chart
Each numbered marker is a change I recorded. Point at one to read what changed, or open it. This is the market from the latest change above.
Loading the market…
Yes price1Rules edit
When edits land
Changes per hour, last 14 days, UTC. Darker means more.
How wide the edit window is
From my last check with the old text to the check that found the new text
How it works
Neither venue tells holders when it edits a market. So I keep a copy of every market's rules and compare.
1
I save the rules
The rules text, resolution source, end date, title and UMA status of every market that traded in the last day: 105,609 right now.
2
I reread them
Every 5 minutes for watched markets, Kalshi markets as Kalshi updates them, busy Polymarket markets every hour or two. A changed fingerprint means an edit.
3
You get the diff
Removed words in red, added words in green, the window it happened in and the price. If you watch the market, the alert goes to Discord, a webhook or RSS.
The diff
Read the edit as sentences
A rewritten sentence shows the old phrase and the new phrase whole, so you can read both. Inline or side by side, with unchanged text folded down to the parts around the edit.
- Word counts per field, added and removed
- Dates and sources shown as before and after values
- A share card with the same red and green for X and Discord
Alerts
A message within one check of the edit
Put a market on your watchlist, or paste your Polymarket wallet and I follow every open position. Each alert carries the market, the kind of edit and the changed lines, so you can decide without opening anything.
- Discord, any JSON webhook, private RSS
- One alert per edit, even when it hits a whole event
- Quiet mode skips date moves and routine proposals
RulesWatch BOT Today at 00:10 UTC
Will Anthropic's valuation hit (HIGH) $1.75T by December 31?
Polymarket: Rules edited.
Rules: - reaches or exceeds + is equal to or beyond (equal to or above for ↑ HIGH valuations, equal to or below for ↓ LOW valuations)
The record
How often each venue edits, and when
Counts by venue, kind and category, how many edits come in the last 48 hours before a market ends, the most edited markets, and how traders rated each edit. Built only from what I recorded, and it grows every day.
Edits per day
Both venues, one edit per eventWho uses it
Traders holding positions
Paste your wallet or the markets you hold. When a clarification lands on one of them, you know before the order book refills.
Market makers and bots
Send every edit to your own server as JSON, with the before and after text of each field, and pull quotes before you're picked off.
Reporters and researchers
Quote a dated record of what a market said before an edit. Export every change as CSV, or link a change page that shows the diff.
Guides
Plain answers to what traders search for, with the live numbers.
What is a Polymarket clarification?
What "Additional context" is, what it does to open orders, and how to see each one.
Can Polymarket change the rules after you buy?
The cases on record and how often edits happen.
Can Kalshi change the rules?
What its rulebook allows and the edits I have recorded.
Also: did a market's rules change? · alerts for Kalshi rules changes · edits this month · this week's report.
Pricing
The feed, the record and every market page are free for everyone.
Free
$0
for as long as the site runs
- The full feed of edits on both venues
- Every market page: price chart, rules history, resolution status
- The record and weekly reports
- A watchlist with one market
- Alerts to one Discord channel, plus private RSS
- Alerts when a trader links a Discord or X clarification
Pro Paid once
$12 one time
no subscription, 14-day refund
- Everything in Free
- No limit on watched markets
- Your Polymarket wallet followed: markets added and dropped as you trade
- webhook alerts, up to five channels
- CSV and JSON export of every recorded change, and the API with your key
- Sign in on any device with your key or a passkey
Questions
Why would the rules change after I bought?
Polymarket adds a clarification when the rules don't settle a case that came up: a recount, a postponed game, a source that stopped publishing. Kalshi edits contract terms and dates. Both say these edits only explain what the rules meant. Traders have lost money when an edit decided the outcome, as in the MicroStrategy market in June 2026.
How fast do I hear about an edit?
Markets on a watchlist are checked every 5 minutes. When an edit lands, the alert goes out on the same run or the next one. Kalshi's API lists the markets it updated, so most Kalshi edits show up within 10 minutes; on the busiest evenings I can't read every update and skip ahead. Busy Polymarket markets are reread every hour or two; quiet ones much less often, so put yours on a watchlist.
What does RulesWatch miss?
A clarification posted only on Discord or X, without an edit to the market, never reaches the API. Each market page has a box where traders link those, and watchers get an alert. If a market changes twice between two checks, I see only the end result. The time shown is when I noticed, inside a window I state.
Is every change a clarification?
No. Each change gets a label from what changed: a clarification, a rules edit, a new resolution source, moved dates, a renamed market, a disputed outcome. Routine steps, like an outcome proposed when a market ends or a target price filled in when a short market opens, are kept but left out of the default feed.
Why can't I see edits from before October 31?
Neither venue keeps old versions of its rules. I took the first snapshot of every open market on October 31, 2026, and every edit since is compared against it. A copy of this site started today would begin with an empty history.
Do I need an account?
No. A watchlist lives in your browser. Open it on another device with a private link, a passkey, or your Pro license key.
What does Pro cost?
$12, paid once. It removes the one-market limit, follows your Polymarket wallet, adds webhook alerts and CSV or JSON export. If it isn't useful, ask within 14 days for a full refund.
Are you part of Polymarket or Kalshi?
No. RulesWatch reads their public APIs and isn't affiliated with either venue, or with UMA. The rules on the venue's own page are the ones that count.
The count is not over. Watch the races you hold.
Recounts, runoffs and late calls are the cases clarifications get written for. 105,609 markets are on record, including every House, Senate and governor market on both venues.