Bitcoin Up or Down on August 13?

Platform comparison

Market context

The market tests whether Bitcoin's price at noon ET on 13 August 2026 will be higher than its noon ET price on 12 August 2026, based on Binance spot data. The crowd is pricing a 74% probability of an upward move, implying a 26% chance of a decline or flat close over this single-day window.

Intraday directional bets on Bitcoin over 24-hour periods have historically skewed toward the consensus when major macroeconomic events or Fed communications are absent. Single-day price movements in the 1–3% range occur roughly 60–70% of the time, with directional bias often determined by preceding week momentum rather than day-of catalysts. The current 74% YES probability sits above the typical baseline for random walk expectations, suggesting the market is pricing in either positive overnight positioning or recent uptrend continuation. This leaves a potential value angle for contrarians if overnight volatility spikes or if Asian and European trading sessions deliver unexpected selling pressure before the US noon close.

Traders should monitor any cryptocurrency-specific news between 12 August noon and 13 August noon ET—regulatory announcements, major exchange incidents, or macroeconomic data releases can shift intraday momentum sharply. Bitcoin's correlation to equity futures and Treasury yields remains material; any significant moves in US equity indices or bond markets during this window could override directional expectations. The settlement depends entirely on Binance's 1-minute candle closes at precisely noon ET on both dates, making execution timing and data feed accuracy critical to resolution.

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

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.

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.

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%.