FIX· Comfort Systems USA

Dark pool · off-exchange short volume

as of 2026-11-05

FIX's off-exchange short-volume ratio was 29.6% on 5 Nov 2026, below its 20-day average of 46.8%. Off-exchange trading was 41% of volume over the last 20 sessions. 16 sessions in the last six months had unusually large off-exchange dollar volume, the latest on 4 Nov 2026.

Short ratio (latest)

29.6%

20-day average

46.8%

Off-exchange share (20d)

41%

Darkpool density

big day, short ratio above trendbelow trendbubble size = how unusual ($vol z-score)

Last ~6 months. Bubbles mark days of unusually large off-exchange dollar volume (≥1.5σ vs the trailing 60 days). Daily resolution — not print-level data.

Darkpool levels ±15% of spot, since 2018-10-01

1244.09

0.55B

1222.27

0.43B

1200.44

0.53B

1178.61

0.57B

1156.79

0.70B

1134.96

0.84B

1113.14

0.86B

1091.31

0.49B

1069.48

0.44B

1047.66

0.34B

1025.83

0.67B

1004.01

1.11B

982.18

1.82B

960.35

2.14B

938.53

1.25B

Historical off-exchange $ volume at price: each day's volume spread across that day's range, summed over the full FINRA history. Heavy shelves often act as support/resistance magnets. Amber row = spot's bin.

Off-exchange short-volume ratio

short ratio (20d, right) daily off-exchange share (left)

FINRA daily TRF data, last 2 years. A persistently HIGH short ratio is mostly passive market-maker liquidity provision (commonly read as accumulation pressure) — not naively bearish.