Bitcoin 5-Minute Market Orderbook Depth — 2026-05-21

On 2026-05-21, full orderbook depth was captured for 204 Polymarket BTC 5-minute Up/Down market rounds — approximately 43,949 bid/ask snapshots totalling 290.7 MB of JSONL. Each snapshot lists every price level and size for both the Up and Down side.

204
Rounds recorded
~43,949
Depth snapshots
290.7 MB
Raw size
1.2¢
Avg opening spread
Up side, best ask − best bid

Replay the day's most active round

btc-updown-5m-1779359100_orderbook.jsonl produced 1.53 MB of snapshots — the deepest recording of 2026-05-21. 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.

4.96 min left
frame 1/48▸ auto-playing — drag to scrubUp-side spread: 1¢
UP token
4.96 min remaining
pricesize
0.496
0.4839.6
0.4718.77
0.45500
0.4465
0.4210.72
0.4110
0.4515
0.39860.48
0.3870.25
0.371,561.35
0.36202.88
spread1¢
0.35150.35
0.3472.35
0.33121.15
0.3269
0.3157
0.393.66
0.2959
0.2867
0.2774
0.2654
0.2559
0.2474
DOWN token
4.96 min remaining
pricesize
0.7682
0.7572
0.7462
0.7382
0.7267
0.7167
0.793.66
0.6957
0.6877
0.67121.15
0.6685
0.65245.65
spread1¢
0.64180.9
0.631,569.35
0.6270.25
0.61868.48
0.6523
0.5918
0.5818.72
0.578
0.5673
0.55528
0.5438
0.5356.77

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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