The Architecture of Key Option Levels

Options market structure is defined by open interest concentration. Three primary levels dictate intraday price boundaries:

1. The Call Wall (Major Resistance)

The Call Wall is the strike price with the largest concentration of net call option open interest. As the underlying asset rallies toward this strike, market makers holding short call hedges are forced to sell underlying futures to maintain delta neutrality, creating a strong overhead resistance ceiling.

2. The Put Wall (Major Support Floor)

The Put Wall represents the largest concentration of net put option open interest. As prices pull back toward the Put Wall, market makers buy back underlying hedges, providing a cushion that absorbs downside selling pressure.

3. The Volatility Trigger (Zero Gamma Boundary)

The Volatility Trigger marks the precise threshold where total market maker gamma flips from net positive to net negative. Trading below this level signals an environment where volatility is likely to expand rapidly.