At 00:00 UTC on August 7, 2026, Polymarket will permanently change how its short-duration crypto Up/Down markets resolve.
The new rules:
- All 5-minute markets → 30-second Chainlink TWAP
- All 15-minute and 4-hour markets → 60-second Chainlink TWAP
Both the opening “price to beat” and the final settlement price will now come from the same TWAP feed. The single-snapshot resolution model is ending.
This is one of the more meaningful infrastructure upgrades Polymarket has made for these markets. The explicit goal is to raise the cost of last-second price manipulation. Sustaining artificial pressure across a full 30- or 60-second window is significantly more expensive and visible than moving the price for a single tick at expiry.
Current State of the Ecosystem (August 6 evening)
- Polymarket’s public RTDS WebSocket has been live and delivering 30s / 60s Chainlink TWAP prices since August 4. No Chainlink credentials are required.
- Chainlink mainnet TWAP feeds have been available for several days.
- The $1 million liquidity rewards program for August is active across all affected 5m, 15m, and 4h crypto markets.
Most serious operators appear to have already completed (or nearly completed) their integration work. The overall atmosphere is one of quiet preparation rather than panic.
What Active Participants Are Saying and Doing
Several operators running real size or production systems have shared concrete updates in the last 48–72 hours:
@dontoverfit** (publicly reported +$200k PnL in July) stated that all of his strategies will need work and he is expecting a slower month while adapting. He also expressed curiosity about how previous manipulators will respond to the new resolution criteria.
@trustdev_eth** shipped full TWAP support in both his analysis tool and live bot on August 5, reading the 30s/60s feeds via Polymarket RTDS. The following day he shared a specific recent 5-minute BTC market where his pre-TWAP bot took a loss. When he re-ran the same signal against historical TWAP resolution, the outcome flipped in his favor. He described the upcoming switch as positive for his system.
@kinexbtdev** has been publicly rebuilding signal generation, backtests, and execution logic around forecasting the average rather than the final tick. He also published early empirical numbers on prediction accuracy inside the final window under TWAP conditions (last 90 seconds vs last 30 seconds).
Liquidity-oriented accounts (including @leshuuuk, @Atlantislq and several others) are actively positioning around the $1M August rewards and framing the launch window as a high-activity period for market makers and LPs.
Notably, several of the largest long-term PnL accounts have remained relatively quiet on the topic in the final days before the switch. Visible activity is concentrated among mid-to-high volume systematic traders and bot operators who are finishing their adaptations.
Technical Observations Circulating Among Builders
A few developers testing the live RTDS feed have noted that the exact composition of the 30-second window is not a pure trailing average from T−29 to T. There appears to be a small offset in the sampling window (observations closer to T−32 through T−3 in some tests). This is worth verifying against your own logs if your strategy is sensitive to the precise edges of the averaging period.
Other practical points being discussed:
- The TWAP is a true look-back window, not a publication frequency.
- Both opening and closing references now use the same feed, so the entire market frame is consistent.
- Historical re-runs of recent markets show that TWAP flips only a modest percentage of close outcomes, usually by small basis-point differences.
Short-Term Implications
The combination of a cleaner resolution mechanism and temporary liquidity incentives creates two simultaneous effects:
- Last-tick sniping and pure close-momentum strategies lose relative power.
- Path-dependent approaches, running-TWAP projectors, and market-making strategies gain relative importance — especially while the $1M rewards are active.
The first 24–48 hours after the switch will be the most informative. Spreads, depth, and the behavior of residual close-oriented flow will reveal how quickly the market adapts.
Overall picture as of the evening of August 6: the transition appears orderly. Most systematic participants view the change as a net improvement in market integrity and are treating it as a required engineering update rather than a crisis.
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