Bitcoin 5-Minute Market Orderbook Depth — 2026-10-18

On 2026-10-18, full orderbook depth was captured for 288 Polymarket BTC 5-minute Up/Down market rounds — approximately 60,117 bid/ask snapshots totalling 400.4 MB of JSONL. Each snapshot lists every price level and size for both the Up and Down side.

288
Rounds recorded
~60,117
Depth snapshots
400.4 MB
Raw size
1.1¢
Avg opening spread
Up side, best ask − best bid

Replay the day's most active round

btc-updown-5m-1792360800_orderbook.jsonl produced 1.6 MB of snapshots — the deepest recording of 2026-10-18. Watch both books evolve from open to resolution: the Up-side spread tightened from 1¢ to 0¢ as the outcome crystallised. Bars show size at each level, scaled within each ladder.

4.98 min left
frame 1/48▸ auto-playing — drag to scrubUp-side spread: 1¢
UP token
4.98 min remaining
pricesize
0.51508
0.5316
0.49362
0.48170
0.47170
0.46202
0.45192
0.44208
0.4382
0.4272
0.4147
0.4131
spread1¢
0.3958
0.38249.38
0.37336.48
0.361,048
0.35305
0.34382
0.33412
0.32216
0.31367
0.3142
0.29362
0.28358
DOWN token
4.98 min remaining
pricesize
0.72698
0.71650
0.7457
0.69649
0.68507
0.67723
0.66731
0.65679
0.641,370
0.63213.48
0.62150
0.61284.36
spread1¢
0.6105
0.5982
0.5895
0.57120
0.56213
0.55152
0.54284
0.53238
0.52308
0.51487
0.5431
0.49613

Showing 48 sampled snapshots, 12 levels nearest the touch on each side. The raw JSONL carries the complete ladder — every level, every ~1.5 seconds, for both tokens.

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