What do the triangles in the SpotGamma HIRO Indicator mean? A Green Triangle may indicate that market makers have to buy stocks in order to hedge the options trade that just took place. A Red Triangle may indicate that market makers hav to sell stocks in order to hedge the options trade that just took place. The numbers inside the triangle indicates the impact of the trade with a higher number denoting higher impact. These colors are defaults and can be customized to your liking. For customization instructions click here. Related articles What does the Delta Filter in the SpotGamma HIRO Indicator mean? How do I use the SpotGamma HIRO Indicator? How can I adjust the settings in the SpotGamma HIRO Indicator? How can the SpotGamma HIRO Indicator help me trade? Can you give some examples of how to use the SpotGamma HIRO Indicator?