MRNA

Dark pool — off-exchange short volume

GEX Back to dark pool

Short ratio (latest)

63.7%

20-day average

58.7%

Off-exchange share (20d)

37%

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

52.73

2.15B

51.81

2.09B

50.88

2.01B

49.96

2.23B

49.03

2.20B

48.11

2.28B

47.18

2.31B

46.26

1.89B

45.33

1.37B

44.40

1.47B

43.48

1.70B

42.55

1.78B

41.63

1.69B

40.70

1.25B

39.78

1.14B

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.