It's a little difficult to parse but this is hourly share of transactions. If transactions were evenly spread out over 8 hours a day, 7 days a week, each hour w

It's a little difficult to parse but this is hourly share of transactions. If transactions were evenly spread out over 8 hours a day, 7 days a week, each hour would get about 1.8% of transactions. So a 0.4% change in hourly share for a given hour is quite significant.