What is the SpotGamma HIRO Indicator? The SpotGamma HIRO Indicator is an options based indicator by SpotGamma running atop of Bookmap charts. HIRO stands for "Hedging Impact Real-Time Options". One of the strongest forces in futures markets is that of options hedging. Large options transactions can often require large hedges which can lead to rapid fluctuations in markets. Now, in real time, SpotGamma decodes these large options trades on Bookmap. Each time an option trade takes place, SpotGamma’s proprietary algorithm determines the estimated hedging impact which is then displayed as a customizable indicator on the relevant underlying symbol chart in Bookmap. Related articles How do I purchase the SpotGamma HIRO Indicator? How much does the SpotGamma HIRO Indicator cost? What does HIRO stand for? How do I install the HIRO Indicator? What is key value of the SpotGamma HIRO Indicator?