Bitcoin 5-Minute Market Orderbook Depth — 2026-09-30

On 2026-09-30, full orderbook depth was captured for 131 Polymarket BTC 5-minute Up/Down market rounds — approximately 27,527 bid/ask snapshots totalling 182.9 MB of JSONL. Each snapshot lists every price level and size for both the Up and Down side.

131
Rounds recorded
~27,527
Depth snapshots
182.9 MB
Raw size
1.0¢
Avg opening spread
Up side, best ask − best bid

Replay the day's most active round

btc-updown-5m-1790736000_orderbook.jsonl produced 1.61 MB of snapshots — the deepest recording of 2026-09-30. 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
0.85173
0.84310
0.831,235
0.82209.8
0.81194
0.8473
0.79193
0.78192
0.77341.12
0.76250
0.75321.66
0.74120
spread1¢
0.73327
0.72582
0.711,053
0.7327
0.69148
0.68122
0.67319
0.66290
0.65300
0.64289
0.63288
0.62293
DOWN token
4.97 min remaining
pricesize
0.38303
0.37303
0.36294
0.35310
0.34350
0.33329
0.32138
0.31214
0.3170
0.291,356
0.28742
0.271,483
spread2¢
0.2549.69
0.2445
0.23238
0.22120
0.21156
0.2511
0.19194
0.18392
0.17515
0.16350
0.15381
0.14541

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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