Indicators to Review Daily When Trading SPY-Gamma for Starts

 https://www.barchart.com/etfs-funds/quotes/SPY/gamma-exposure?expiration=2025-10-30-w

  Gamma Exposure (GEX) also known as Gamma Levels, measures the change in delta exposure for options based on changes in the underlying price. Gamma exposure highlights important price levels where there is significant gamma based on market positioning and open interest. 

These elevated values reflect where market-makers may need to hedge to mitigate their risk, offering important levels of support and resistance. By default, gamma exposure levels are calculated on 4 nearby expirations, based on a 1% move of the underlying security using gamma and open interest. 

Gamma exposure is calculated and updated throughout the day. Current gamma values, volume, and open interest can be found in the Volatilities & Greeks page for the security. For more information, watch this YouTube video.

Implied Volatility: 14.22%

Historic Volatility: 11.94%

IV Rank: 13.79%

IV Percentile: 54%

SPY gamma flip point is 683.62 where gamma exposure switches positive to negative (or vice versa). The gamma flip point, and call and put wall, are based on aggregate gamma exposure across all contracts. They are calculated using open interest, on a 1% move, using end-of-day data, updated at approximately 8:30pm ET for the next trading day.

SPY put wall is 685.00. SPY call wall is 690.00. Put and Call Wall figures are based on the highest gamma reading across all contracts.