Bitcoin 5-Minute Market Orderbook Depth — 2026-04-27

On 2026-04-27, full orderbook depth was captured for 288 Polymarket BTC 5-minute Up/Down market rounds — approximately 61,940 bid/ask snapshots totalling 410.5 MB of JSONL. Each snapshot lists every price level and size for both the Up and Down side.

288
Rounds recorded
~61,940
Depth snapshots
410.5 MB
Raw size
1.2¢
Avg opening spread
Up side, best ask − best bid

Replay the day's most active round

btc-updown-5m-1777300500_orderbook.jsonl produced 1.51 MB of snapshots — the deepest recording of 2026-04-27. 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.

4.97 min left
frame 1/48▸ auto-playing — drag to scrubUp-side spread: 1¢
UP token
4.97 min remaining
pricesize
0.6171
0.5996.84
0.5830
0.57112
0.5677
0.55480.22
0.5457
0.5337.63
0.52167
0.51313.22
0.5427
0.499.16
spread1¢
0.4858.11
0.4783.73
0.46147
0.45464.22
0.4499.32
0.4348
0.4260
0.4183.84
0.4101
0.3918
0.3812
0.3717
DOWN token
4.97 min remaining
pricesize
0.6317
0.6212
0.6118
0.6116
0.5983.84
0.5860
0.5748
0.5699.32
0.55478.22
0.54147
0.5383.73
0.5235.07
spread1¢
0.5114.16
0.5427
0.49313.22
0.48167
0.4737.63
0.4657
0.45480.22
0.4477
0.43112
0.4230
0.41152.84
0.4171

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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