Do you base your indicators on historical data simulations? If not, how can you determine the value of the addon? The indicators utilize our proprietary formulas and are not based on historical data simulations. They are based on the estimated hedge impact of real time options trades. As we move forward, the historical data we collect will allow us to better assess correlations and signals. Related articles Will you add historical data to the SpotGamma HIRO Indicator? What is the concept of delta-hedge exactly? What stocks/tickers are displayed in the HIRO Indicator? Can I reset the cumulative line in the HIRO Indicator? What is included in each SpotGamma subscription level?