Bitcoin Up or Down - August 17, 12PM ET

Platform comparison

Market context

Bitcoin's price movement during a single hourly candle on Binance's BTC/USDT pair on 17 August 2026 will determine whether this contract settles to "Up" or "Down". The market currently reflects zero probability of an upward close, suggesting traders are pricing in either a decline or flat performance during that specific 60-minute window. Settlement depends on comparing the opening price at 12:00 PM ET against the closing price at 1:00 PM ET, with the data pulled directly from Binance's 1H charting interface once the candle finalises.

Hourly Bitcoin movements have historically shown roughly balanced directional outcomes across large sample sizes, though intraday volatility clusters around macroeconomic announcements and futures expiration events. The 0% implied probability here appears disconnected from baseline hourly price action patterns, where single-hour candles typically close higher or lower with near-symmetrical frequency. This pricing may reflect either illiquidity in the market, extreme bearish sentiment concentrated in a specific timeframe, or insufficient trader participation to establish a realistic probability distribution.

Traders monitoring this contract should track whether major economic data releases or Federal Reserve communications are scheduled for 12–1 PM ET on that date, as such events can drive directional pressure within tight windows. Bitcoin's correlation with equity futures and Treasury yields during US trading hours remains a primary driver of intraday momentum. The settlement window closes at 5 PM ET, allowing sufficient time for Binance's candle data to finalise before resolution occurs on the Polygon-based conditional token contract.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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.

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%.