The essential notions: order book, order flow and gamma

To understand the November 3 session, you have to hold two things together: the battle between orders in the book, shown by DeepDom, and market makers' options positioning, shown by Deepchart. Neither is enough on its own. The book tells you who is fighting and where, to the second; gamma tells you which mechanism will kick in when price reaches a level. Here is the minimal vocabulary on both sides. If a term is missing later on, the module 6 glossary covers it.