Quick Answer: The three most important Greeks for 0DTE trading are Gamma (controls price acceleration), Delta (determines directional exposure), and Charm (drives end-of-day pinning). Understanding how these Greeks interact with market maker hedging is essential for profiting from zero-day-to-expiration options.
Trading 0DTE options is not like trading standard monthlies. With zero time value left to decay, the Greeks that matter most shift dramatically. Forget Vega and Theta—when you’re playing for the same-day close, Gamma, Delta, and Charm are the only three Greeks that will make or break your P&L.
1. Gamma: The Acceleration Pedal
What it is: Gamma measures the rate of change of Delta. For 0DTE options, Gamma is at its absolute maximum, meaning small price moves create massive swings in an option’s directional exposure.
Why it matters for 0DTE: In a high-Gamma environment, market makers must constantly re-hedge their positions. This creates the “Gamma Squeeze” (when dealers chase price higher) or “Gamma Slide” (when dealers sell into weakness). Use SpotGamma GEX levels to see exactly where Gamma is concentrated.
2. Delta: The Directional Compass
What it is: Delta measures how much an option’s price changes for every move in the underlying. For 0DTE, Delta can flip from 0.10 to 0.90 in minutes as price approaches a strike.
Why it matters for 0DTE: Delta tells you how exposed you are at any given moment. More importantly, Delta Pressure shows you where market makers are being forced to buy or sell futures to hedge. This is your roadmap for support and resistance.
3. Charm: The End-of-Day Magnet
What it is: Charm (Delta Decay) measures how Delta changes as time passes. As expiration approaches, Charm forces options to resolve toward either 0 or 100 Delta.
Why it matters for 0DTE: Charm Pressure is the engine behind the “4:00 PM Pin.” As time runs out, dealers must bleed off their delta hedges, creating gravitational pull toward high-open-interest strikes. SpotGamma TRACE shows you exactly where this pressure is building.
The 0DTE Greek Hierarchy
Greek
What It Controls
When It Matters Most
Gamma
Price acceleration/deceleration
All day (especially near key strikes)
Delta
Directional exposure
Entry/exit decisions
Charm
End-of-day pinning
Final 2 hours (2:00-4:00 PM ET)
Want to see these Greeks in action? Join SpotGamma Alpha and access the real-time TRACE dashboard for 0DTE analysis.
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