The Chirp emails I get have links within the table of histogram entries, but those links don't work -- they seem to not have a date selected.  I'd suggest they have "latest available" selected.  Example link from the emails:

https://uma.googleplex.com/timeline_v2?q=%7B%22day_count%22%3A%2237%22%2C%22end_date%22%3A%222016%2F07%2F08%22%2C%22entries%22%3A%5B%7B%22bucket%22%3A%22STATUS_200%22%2C%22logScale%22%3Afalse%2C%22measure%22%3A%22bucketProp%22%2C%22percentile%22%3A%2250%22%2C%22showLowVolumeData%22%3Atrue%2C%22zeroBased%22%3Afalse%7D%5D%2C%22filters%22%3A%5B%7B%22fieldId%22%3A%22channel%22%2C%22operator%22%3A%22EQ%22%2C%22selected%22%3A%5B%5D%2C%22value%22%3A%224%22%7D%2C%7B%22fieldId%22%3A%22platform%22%2C%22operator%22%3A%22EQ%22%2C%22selected%22%3A%5B%5D%2C%22value%22%3A%22M%22%7D%2C%7B%22fieldId%22%3A%22milestone%22%2C%22operator%22%3A%22GE%22%2C%22selected%22%3A%5B%5D%2C%22value%22%3A%2250%22%7D%5D%2C%22histograms%22%3A%5B%22SB2.GetHashResultDownload%22%5D%2C%22window_size%22%3A3%7D