How do I join the SpotGamma SlackChat? The SpotGamma SlackChat is exclusively for paying subscribers of SpotGamma. You can request to join the SpotGamma SlackChat here. Related articles What are the community guidelines for the SpotGamma Slack Chat? What is the SpotGamma Imp 1 Day Move? Can Dark Pool Activity Predict Stock Returns? What is Bookmap? Why are the SpotGamma levels for NDX & SPX different from the NQ/ES levels in Bookmap?