Execution Velocity Engineering

All day, volume and price were de-linked — small spurts, then stalls. But starting at 3:35 PM, three things occurred at once, which almost never synchronize this tightly without intervention:

1. Volume clustering compressed

2. Price velocity jumped by more than 100% in under 30 seconds

3. Bid-ask spread tightened and swept repeatedly — while price still surged

This…