Bitcoin Up or Down - August 20, 3AM ET

Platform comparison

Market context

Bitcoin's price movement during a single hourly candle on 20 August 2026 at 3AM Eastern Time will determine this market's outcome. The resolution hinges on whether BTC/USDT closes at or above its opening price on Binance during that specific 1-hour window, a timeframe narrow enough to exclude most macroeconomic announcements but sensitive to intraday volatility and algorithmic trading patterns.

The 0% implied probability reflects an unusual consensus across prediction markets, suggesting either extreme confidence in downward pressure or a liquidity desert where no traders have committed capital. Historical hourly Bitcoin candles show roughly 50–52% close above open across neutral market conditions, making a 0% reading a statistical outlier rather than a genuine forecast. When prediction markets diverge this sharply from baseline historical frequencies, it typically signals either thin order books with minimal price discovery or a specific catalyst expected within that window. Comparable hourly contracts on other exchanges rarely settle with such skewed probabilities unless tied to scheduled events.

Traders monitoring this contract should track whether any major announcements—regulatory filings, Federal Reserve communications, or significant exchange listings—fall within the 3–4AM ET window on that date. Bitcoin's overnight volatility often reflects Asian market opens and European morning trading, both of which can drive directional momentum. The settlement window closes at 8AM ET, providing a four-hour buffer after candle close for Binance data to finalise. Cross-platform comparison with Kalshi's crypto offerings may reveal whether similar hourly contracts on other assets show comparable probability skew, indicating either a systematic market inefficiency or platform-specific liquidity constraints.

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 PolyGram, which mirrors the Polymarket order book directly.

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.

FAQ

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 PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.