GexFlow guides
Short guides that explain options gamma levels, 0DTE options and the premarket in plain English. Each one tells you what a tool measures and what it cannot tell you.
What Is Gamma Exposure (GEX) and How to Read It
Where the number comes from, why dealer hedging matters and how to read positive and negative gamma. Start here.
Zero Gamma (Gamma Flip) Explained
The price where total dealer gamma changes sign, and why hedging behaves differently on each side.
Call Wall and Put Wall Explained
The strikes with the most call and put gamma, why price often hesitates near them and why they are not guarantees.
What Are 0DTE Options and Their Risks
Options that expire the same day: why theta and gamma dominate and how the value can vanish in minutes.
Options Greeks for Beginners: Delta, Gamma and Theta
What delta, gamma and theta measure, with a simple example for one option.
Premarket: What to Watch from 4:00 to 9:30 AM ET
A routine for the hours before the open, in New York time, from the overnight range to the first release.
A Checklist to Read SPX Levels Before the Open
A repeatable review: overnight ranges, yesterday's levels, the averages, Zero Gamma, the walls and the news.
5 Common Mistakes When Using Gamma Levels
The habits that make gamma levels misleading, and what to check before relying on a line.