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BTC Daily Signal Post-Mortem: +7.83 pp Edge

Bitcoin Up or Down on July 20?

POLYMARKET ENTRY59.5%66.0% EXECUTABLE
MARX FAIR AT ENTRY24.1%HISTORICAL · CLOSED
MODELED EDGE+7.83 ppNET AT ENTRY
CONFIDENCE83.3%DOWN UNDERPRICED
RETURN-4.6%SIMULATED
ROUND REPLAY

Interactive Polymarket vs Marx Fair divergence

Market UP 30.5%Marx Fair UP 24.8%
Market UP and Marx Fair UP history0255075100
Jul 20, 08:53 AMJul 20, 10:10 AMJul 20, 11:27 AMJul 20, 12:43 PMJul 20, 02:00 PM UTC

Market UP and Marx Fair UP history

Text equivalent of the chart
TimePolymarketMarx FairEdge
2026-07-20T08:53:17.859Z23.5%18.8%-4.7 pp
2026-07-20T08:57:21.937Z23.5%18.8%-4.7 pp
2026-07-20T09:54:19.714Z30.5%26.4%-4.1 pp
2026-07-20T09:57:24.124Z30.5%26.4%-4.1 pp
2026-07-20T10:57:27.801Z33.5%29.6%-3.9 pp
2026-07-20T10:58:34.903Z34.5%29.6%-4.9 pp
2026-07-20T11:49:45.457Z67.5%79.1%+11.6 pp
2026-07-20T11:56:39.898Z72.5%82.3%+9.8 pp
2026-07-20T11:59:44.633Z72.5%82.3%+9.8 pp
2026-07-20T12:00:45.826Z72.5%80.3%+7.8 pp
2026-07-20T12:54:39.307Z53.5%56.3%+2.8 pp
2026-07-20T12:59:45.307Z53.5%56.3%+2.8 pp
2026-07-20T13:55:46.204Z59.5%24.1%-35.4 pp
2026-07-20T13:56:45.243Z59.5%21.3%-38.2 pp
2026-07-20T13:59:39.445Z30.5%22.5%-8.0 pp
2026-07-20T13:59:44.929Z30.5%22.5%-8.0 pp
2026-07-20T14:00:47.197Z30.5%24.8%-5.7 pp
AUDIT TRAIL

Signal breakdown and trigger

  • Marx Fair was 24.1% while the Polymarket UP price was 59.5%.
  • The executable DOWN entry was 66.0¢ with a net modeled edge of 7.8 percentage points.
  • Model confidence at the signal was 83.3%.
  • Observed order-book spread at entry was 1.0¢.
MODEL NOTE

Marx AI inference

Buy DOWN: $100 VWAP 66.0%, gross edge 9.9%, slippage 0.0%, fee 1.6%, safety 0.5%, net edge 7.8%. Marx fair UP is 24.1%.

BTC Daily Signal Post-Mortem: +7.83 pp Edge | AntiPredict