Bitcoin Up or Down - August 20, 4AM ET

Platform comparison

Market context

This market settles on whether Bitcoin's price on Binance's BTC/USDT pair closes higher than or equal to its opening level during the one-hour candle beginning 20 August 2026 at 04:00 ET. The resolution hinges on Binance's published open and close values for that specific hourly bar, with a five-hour settlement window allowing for candle finalisation before the 09:00 ET deadline.

A 100% crowd probability on directional hourly moves reflects the inherent difficulty in pricing such short-duration events with genuine conviction. Historical analysis of Bitcoin's intraday volatility shows that single-hour candles close positive roughly 50–52% of the time across extended periods, though this varies by market regime and time-of-day effects. August typically sees moderate volatility relative to spring and autumn peaks; traders using conditional orders or bot-driven strategies often treat hourly binary outcomes as noise-dominated rather than signal-driven, making extreme probabilities a red flag for mispricing rather than genuine edge.

For programmatic traders, the key dependencies are Binance API latency, funding rate conditions at that hour, and any macroeconomic data releases scheduled near 04:00 ET on that date. Spot-futures basis spreads and liquidation clustering on leverage exchanges can drive brief directional moves, though a single hourly candle rarely captures sustained momentum. Traders integrating this market into automated workflows should cross-reference Binance's official candle data against alternative sources—CoinGecko or Kraken—to confirm no data anomalies, and set alerts for any scheduled maintenance windows that might affect price feed reliability during the settlement period.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Bot UK, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

UK Frequently Asked Questions

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 Polymarket Bot UK. 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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.