Dealer-positioning models surface more than one important level. Alongside the gamma flip, several frameworks compute a “vol trigger” — a price below which the model expects volatility to expand, as dealer hedging shifts from suppressing movement to feeding it.
How it differs from the flip
The two are cousins, not twins. The gamma flip is strictly the zero-line of net dealer gamma — the boundary between dampening and amplifying. The vol trigger is a related but separately-modeled level that emphasizes the volatility regime: above it, ranges tend to stay compressed; below it, expect bigger, faster candles. In practice they often sit near each other, and when they don't, the gap between them is a zone of transition worth respecting.
The flip asks “dampen or amplify?” The vol trigger asks “compressed or expanding?” Related questions, not identical ones.
How to use it
Treat the vol trigger as a heads-up on character, not a precise pivot. Trading above it, lean toward range and reversion tactics; if price loses it, widen your expectations for the size of moves and be quicker to switch to a momentum posture. It pairs naturally with the flip: losing both the flip and the vol trigger is a strong signal the calm regime is over.
The honest caveat
Like every level on the map, the vol trigger is a model estimate reconstructed from options data, and different providers compute it differently. It's context that tilts the odds toward compression or expansion — not a line that must hold. Used that way, it's a useful second read on the same question the whole dealer map is answering: what kind of tape are you in?