Bitcoin Up or Down - August 20, 3AM ET

Platform comparison

Market context

This market settles on whether Bitcoin closes higher than or equal to its opening price during a single hour on 20 August 2026, using Binance's BTC/USDT 1H candle data. The 0% implied probability reflects either minimal liquidity in this particular contract or a technical pricing anomaly, as hourly directional moves in Bitcoin rarely exhibit zero probability in either direction. Polymarket's USDC settlement mechanism on Polygon means traders are pricing this through conditional tokens that resolve based on Binance's published open and close figures for that specific candle.

Historical precedent suggests hourly Bitcoin moves cluster around 50/50 probability when viewed across large sample sizes. A 2023 analysis of Bitcoin's intraday volatility showed roughly equal frequency of up and down hourly candles across major exchanges, with slight variation depending on market regime and time-of-day effects. August typically sees moderate volatility in crypto markets, though 2026 conditions remain unknowable. The extreme 0% pricing here likely indicates either no active market makers at this contract's current price, or a liquidity crunch that's pushed the odds to an unrealistic extreme.

Traders monitoring this contract should note that Bitcoin's August 2026 price action will depend on macroeconomic conditions, Federal Reserve policy signals, and any major regulatory announcements in the preceding weeks. Spot price movements on Binance can diverge slightly from other exchanges during volatile periods, though such gaps typically close within minutes. The five-day settlement window provides ample time for the candle to close and Binance data to finalise before resolution.

Methodology

This page reviews Bitcoin Up or Down - August 20, 3AM ET across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

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

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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%.