The top right section of the HIRO chart provides multiple options that allow you to customize how you view both price and the HIRO indicator in the chart.

When selected, this button adds a green line to the chart that isolates the HIRO value to only next expiry options for the ticker selected. These options expire the same day (0DTE), the next Friday, or at a set time once a month.

When selected alongside Put/Call button, the Next Expiry view will separate the HIRO indicator for these short-dated trades across both calls and puts.

Here's a link to the SpotGamma HIRO User Guide.