Glossary · Options
A put wall is the strike with the largest concentration of dealer put gamma. Because dealers hedge that gamma by buying the underlying as price falls toward the strike, the put wall tends to act as support — the downside price magnet that frequently holds a sell-off into expiration.
It is the mirror image of the call wall. Where the call wall caps the upside, the put wall floors the downside; together they frame the range dealer hedging is mechanically defending on a given day.
At a strike loaded with dealer put gamma, every tick lower in the underlying forces dealers to buy more of it to stay hedged. That mechanical demand appears exactly where the wall sits, so sell-offs into the strike tend to stall and bounce — the level behaves like support even when nothing on the candle chart explains it.
This is why a falling market so often stabilizes at the put wall and chops sideways into expiration: the closer price gets, the more hedging demand shows up.
A put wall is not a guaranteed floor. If aggressive selling pushes price decisively below it, the support disappears and dealer hedging can flip to selling into the decline, accelerating it. A put-wall break frequently coincides with crossing below the gamma flip — the regime where dealer flow amplifies moves rather than dampening them.
That combination is how an orderly pullback turns into an air pocket. Confirming the break on the order flow, instead of assuming the wall holds, is what keeps a long from catching a knife.
A put wall is most useful when it sits on the same chart as the DOM and footprint. As price tests the strike, you can see whether resting bids are absorbing the selling (the wall holds) or whether the bid is pulling and prints are slicing through (the wall is failing).
The dealer level and the live defense of it belong on one screen — that is the point of an integrated workspace rather than a separate gamma dashboard.
It often behaves like support, but it is mechanical, not a chart pattern. The put wall is a dealer-positioning level where hedging flow creates demand. It tends to act as support because of that flow, not because of a prior low or trendline.
The support gives way and dealer hedging can flip from buying the dip to selling into it, amplifying the decline. A put-wall break often coincides with price crossing below the gamma flip, where the regime turns vol-amplifying.
Yes. As open interest and implied volatility change — particularly with 0DTE flow — the strike with the most dealer put gamma can shift, so the put wall should be recomputed intraday, not fixed once in the morning.
Symmetric opposites: the put wall is the downside support magnet (dealers buy into it); the call wall is the upside resistance magnet (dealers sell into it). Together they bound the dealer-defended range.
Sharpnel draws the put wall — with the call wall, gamma flip, and more — on the same chart as your DOM, footprint, and tape, so you can watch the book defend or break the level live. Free Explorer tier on 15-min delayed data.
