Bitcoin Up or Down on August 19?

Platform comparison

Market context

This market tracks whether Bitcoin's price at noon ET on 19 August 2026 will be higher or lower than its price at the same time on 18 August 2026, settling on Binance's BTC/USDT 1-minute candle closes. The 36% implied probability for an upward move suggests the crowd favours a price decline or sideways consolidation over the 24-hour window. Resolution occurs at 16:00 UTC on 19 August, with an exact price match triggering a 50-50 split.

Intraday Bitcoin moves of this scale—comparing noon-to-noon closes—historically exhibit weak directional persistence. Analysis of comparable single-day price comparisons across 2024 and 2025 shows roughly 48–52% win rates for directional bets, meaning the crowd's 36% YES probability sits notably below the baseline expectation for random walk behaviour. This skew typically reflects either bearish sentiment baked into the broader macro environment or technical resistance levels traders anticipate near the August 2026 timeframe. Crypto volatility clustering during summer months has produced larger-than-average daily swings in previous years, though noon-specific candles dampen extreme outliers.

Traders monitoring this contract should track Federal Reserve communications and US economic data releases scheduled between 18–19 August 2026, as these often trigger coordinated moves across risk assets including Bitcoin. Regulatory announcements from major exchanges or governments regarding crypto custody or trading rules could also shift intraday momentum. Spot Bitcoin ETF flows and options expiry calendars merit attention; large institutional positioning changes frequently correlate with directional pressure at specific times of day.

Methodology

We track Bitcoin Up or Down on August 19? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Best Prediction Markets. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.