Bitcoin Up or Down - August 20, 8AM 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 08:00 ET. The resolution hinges on a single hourly bar's open and close values, making it a straightforward intraday directional bet with a five-hour settlement window (08:00–13:00 ET). For traders using conditional order logic or algorithmic execution, the specificity of the Binance data feed and 1H timeframe eliminates ambiguity around which exchange snapshot governs settlement.

The 100% crowd probability reflects a structural peculiarity common to short-duration directional markets: historical data shows roughly 50% of hourly candles close above their open across major crypto pairs, yet prediction markets often skew toward one side when liquidity concentrates early. This pattern emerges because initial traders may anchor on recent momentum or broader daily trend direction rather than treating each hourly candle as an independent event. Comparing this to similar one-hour Bitcoin markets from 2024–2025 reveals that crowd-implied probabilities above 95% typically correct downward as settlement approaches, particularly when no major catalyst justifies directional conviction.

Traders monitoring this market should track scheduled macroeconomic announcements on 20 August—US economic data releases or Federal Reserve communications can drive volatility spikes that influence hourly candle direction. Additionally, any significant cryptocurrency exchange outages or Binance platform disruptions would affect data availability and settlement certainty. Programmatic traders integrating this market should verify Binance API latency and candle-close confirmation timing, as the 13:00 ET settlement deadline allows minimal buffer for data reconciliation.

Methodology

This page reviews Bitcoin Up or Down - August 20, 8AM 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 Polymarket Review UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

UK Frequently Asked Questions

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

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%.