There are Bolus calculators in Loop which propose a bolus. And carbs + Bolus (as part of onboard insulin) are needed for forecasts, i.e. immediate or future temp basal adjustments.
There are Bolus calculators in Loop which propose a bolus. And carbs + Bolus (as part of onboard insulin) are needed for forecasts, i.e. immediate or future temp basal adjustments.