What is the Vol Trigger?
The vol trigger is a proprietary price level developed by SpotGamma that marks the threshold where options-driven volatility dynamics shift. It is closely related to but distinct from the GEX flip. While the GEX flip marks where total dealer gamma crosses zero, the vol trigger specifically identifies the level where vanna and charm flows transition from volatility-suppressing to volatility-amplifying. In practice, the vol trigger often sits near or slightly above the GEX flip, but the two can diverge meaningfully.
How the Vol Trigger Works
The vol trigger captures the interaction between implied volatility and dealer hedging. When the underlying trades above the vol trigger, dealers' hedging activity tends to compress realized volatility. Implied volatility often drifts lower, VIX remains subdued, and the market grinds higher in a low-volatility uptrend. This is the regime most favorable for strategies that sell options premium.
Below the vol trigger, the relationship inverts. Implied volatility rises, dealer hedging amplifies price swings, and realized volatility expands. Drops become sharper, bounces become more violent, and overnight gaps become more common. The vol trigger essentially answers the question: "Is the current options positioning helping or hurting market stability?"
Vol Trigger vs. GEX Flip
Traders sometimes confuse these two levels, but they measure different things:
GEX flip: Where total dealer gamma crosses zero. This is a broad measure of directional hedging pressure.
Vol trigger: Where the combined effect of vanna (sensitivity of delta to changes in IV) and charm (sensitivity of delta to time decay) flows shifts from stabilizing to destabilizing. This captures second-order effects that the simple GEX flip misses.
In practice, when price is between the two levels, you are in a transitional zone. The market may show mixed signals, some suppression of volatility but with periodic spikes. When price is well above both levels, it is clearly a low-vol regime. When price is well below both, expect elevated volatility.
Practical Application for Traders
Use the vol trigger as a pre-market planning tool. Before the open, check where the vol trigger sits relative to the current price. This tells you what kind of day to expect and how to size your positions:
Well above vol trigger (2%+): This is a complacent, low-vol environment. Implied volatility is likely relatively low. Consider selling premium through strangles, iron condors, or calendar spreads. Use tighter position sizing on directional trades because large moves are unlikely.
Near the vol trigger (within 1%): A transitional zone. Be prepared for regime shifts. Reduce overall exposure and avoid large premium-selling positions. The market can quickly transition from calm to volatile if price breaks below.
Below the vol trigger: Elevated volatility mode. Increase position sizing on directional trades but use wider stops. Buying options or using defined-risk strategies becomes more attractive. Avoid naked short premium because volatility could expand further.
Combining Vol Trigger with Other Levels
The most effective approach is to use the vol trigger alongside the GEX flip, call wall, and put wall. When all four levels tell a consistent story (for example, price is above all of them) you have high conviction about the market regime. When signals conflict, reduce size and stay nimble.
Monitoring on SquawkFlow
SquawkFlow publishes its modeled vol trigger alongside the other GEX levels computed from daily-settled Cboe open interest. The level carries its settlement date and does not update from intraday options trades. Where the two products differ on methodology and coverage is set out in our SquawkFlow and SpotGamma comparison.
Understanding the vol trigger transforms your relationship with volatility from reactive to proactive. Instead of being surprised by sudden market swings, you can anticipate them by watching where price sits relative to this critical threshold.