What does the number beside the sliding scale in the “HIRO Signal” column indicate? That is the numerical value of the HIRO indicator. This is proprietary signal similar to that of delta notional. This signal is standardized across underlyings so that you can compare the HIRO value across instruments. SpotGamma Alpha subscribers can access the SpotGamma HIRO Indicator here. Related articles What does each line on the Stock Price Chart represent? What does each axis on the HIRO Price Chart represent? How can I use the SpotGamma HIRO to help me trade? What does the sliding scale in the “HIRO Signal” column indicate? What is the SpotGamma HIRO Indicator?