How this ranking works
Viewer counts are sampled every five minutes from the official platform APIs. Hours watched are the sum of all samples multiplied by the sample interval; average viewers are the mean of all samples while the channel was live; peak viewers is the highest single sample. Only channels with at least one hour of airtime in the selected period are ranked. The arrow next to the rank shows the movement since the previous refresh; the percentage under each value compares it with the period of the same length directly before.
Custom date ranges are calculated on demand from daily aggregates in UTC, so ranks there compare against the equally long stretch of days before the selected range.
