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A two-day chart has fewer points than a one-day chart. Why?

April 26, 2017chart fewer one-day Points two-day

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A two-day chart has fewer points than a one-day chart. Why?

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Charts of two or more days of data will show hourly aggregates of the raw 15-minute data. For example, if the HMS web site presents data at 14:00, 14:15, 14:30, and 14:45, the chart will represent those four points with a single aggregate point at 2 p.m. PST (14/24 = 0.583 day fraction).