Definition
#Measures how aggressive sell notional volume in the active rolling window compares with the historical average sell volume for that same window.
Formula & calculation
#(Current Sell Window Volume / Historical Avg Sell Window Volume) × 100Units & range
%.
Interpretation
#Sell-side notional flow is running above its historical pace for this window. The ratio version of sell volume z-score. A sell ratio of 200% means the current window has processed twice the typical sell notional, meaningful when accompanied by price movement, less so without it.
Practical usage
#Confirms sell-side notional expansion. Cross-check against sell volume z-score: both elevated is a genuine distribution signal; one without the other is likely noise.
Common mistakes
#Frequent interpretation traps and misuse patterns to avoid when applying this metric.
- Treating it as a stand-alone signal without checking the opposing side.
Timeframe note
#This metric applies to rolling windows such as 5m, 15m, and 60m. The underlying definition stays the same; what changes is the time horizon used to measure it. Shorter windows react faster, while longer windows smooth noise and emphasize broader structure.
5m
Faster response to fresh changes in activity and short-horizon structure.
15m
Balanced view between responsiveness and persistence.
60m
Broader context that is slower but more stable.