What is the gamma flip level?
If dealer gamma decides what kind of day you are trading, the gamma flip is the price where that answer changes. It is one of the few levels on an options map whose meaning does not depend on how far away it sits.
How it is derived
Aggregate dealer gamma is not constant across prices — it is calculated strike by strike, so the total changes as spot moves. The flip is the price at which that total crosses zero.
Above it, the book is net positive and hedging dampens moves. Below it, the book is net negative and hedging feeds them.
Why it behaves differently from a wall
A call wall or put wall is a single strike, and its relevance is dominated by distance — far ones are rarely tested. The flip is a regime boundary, so it matters as a piece of context whether or not price goes anywhere near it.
Knowing you are trading two percent below the flip is useful even if price never touches it, because it tells you the hedging around you is amplifying rather than absorbing.
How it moves
The flip is not fixed. It shifts as positioning changes, and it moves most around expiry when large blocks of open interest roll off.
That is worth internalising generally: levels drawn from an option board have a short shelf life. When we measured it, roughly a quarter of dealer walls had moved by the next session and about half were gone within a week. Treat any level as today's read, not a standing line on your chart.
| Where price sits | Dealer book | What hedging does | What that feels like |
|---|---|---|---|
| Above the flip | Net positive gamma | Sells rallies, buys dips | Moves stall; ranges tighten; pins form |
| At the flip | Near zero | No net hedging force | The regime is changing hands |
| Below the flip | Net negative gamma | Buys rallies, sells dips | Moves stretch; ranges expand; gaps run |
Common questions
What happens when price crosses the gamma flip?
The hedging around price changes sides. Above the flip dealers lean against moves; below it they chase them — so a cross often shows up as a sharp change in how fast price travels, in either direction.
Is the gamma flip a directional signal?
No. It says how price is likely to MOVE — absorbed or amplified — not which way. Below the flip a rally and a selloff both travel faster; the flip has no opinion about which one you get.
How often does the flip level move?
Daily, and fastest around expiry. When we measured our own book, roughly a quarter of dealer levels had shifted by the next session and about half were gone within a week — treat the flip as today's read, never a standing line.
Where can I see the flip level live?
The free SPY board shows the live gamma map with the walls and the ★ Apex — no login, on a 15-minute delay. The flip level and the full read, with every level priced by whether the ticker can actually reach it today, are on the member maps.
The flip tells you which regime you are in, which is useful even from a distance. Re-read it daily — it moves, especially near expiry.
Keep reading
See it on a live board
FlowMonkey prices every level by whether your ticker can actually reach it today — measured on that symbol's own range, re-sorted as the session burns down.
See pricing