Can a symbol be added to the SpotGamma HIRO Indicator? If you are interested in a symbol being added to the SpotGamma HIRO Indicator, please email info@spotgamma.com and we will add it to our priority list. SpotGamma Alpha subscribers can access the SpotGamma HIRO Indicator here. Related articles What does the sliding scale in the “HIRO Signal” column indicate? What symbols are listed in the SpotGamma HIRO Indicator? How can I use the SpotGamma HIRO to help me trade? How often does the trending stock list update? What are the trending stocks listed?