Glossary

A feed carrying individual resting orders rather than a total per price. It is what makes “biggest × total” possible: without it, one 200-contract order and forty 5-contract orders are indistinguishable. All you need for it is Level 2 from your prop firm or broker.

Volume that lifted the ask minus volume that hit the bid, over some window. Positive delta means aggressive buyers did more of the work. It says nothing about who was right.

Delta accumulated across bars. Divergence between price and CVD — a higher high on falling CVD — is a common thing to look for, and a common thing to over-read.

In a footprint, a cell where one side substantially exceeds the diagonally opposite cell. The default test is 200% and a minimum raw contract difference, so tiny cells do not trip it.

Resting size shown to attract price and pulled as it arrives. On a heatmap it draws a streak that ends abruptly the moment price gets close.

Every panel reads the same recorded stream of ticks. It is why the heatmap, the footprint and the ladder always describe the same instant rather than three slightly different ones.

A letter-based profile where each letter is a time period that traded at that price. A different view of the same data a volume profile summarises by size.

A measure of dealer options positioning. Heavy positive gamma tends to damp movement as dealers hedge against it; past the flip point that reverses. Context, never a signal.