Weekly Analysis:
Updated at 19th Nov. 2018:

Overview plot and trend
General trend has been downward, despite of one spike due to adjustment on rank requirements aims at Junior Member rank.

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Mean +/- standard deviation; Median (Interquartile range)
1)   The first period, with 4 weeks from 24th Jan. to 18th Feb. 2018 [the first week in these fours is incomplete one).
The mean of weekly merit is 18983 with standard deviation is 8739.
Minimum and maximum of the period are 11722 and 30949, respectively.
2)   The second period, since 19th Feb. 2018, with 38 weeks in total.
The median of the 38-week period is 4423, with 50% of those weeks have total weekly merits in the range from 3854 to 5487 (the interquartile range). 25% of those weeks have total weekly merit above 5487 and 25% of them have total weekly merits below 3854.
Minimum and maximum of the period are 3065 and 8806.

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Potential Outliers
Interquartile Range (Q1 - Q3), with Q1 = 3854, Q3 = 5487.
--> IQR = Q3- Q1 = 5487 - 3854 = 1633.
---> 1.5*IQR = 1633*1.5 = 2450.
Therefore, extremely potential outliers are weeks with total distributed merits above 7937 or below 1404.

Formula to calculate potential outliers:
- Q3 + 1.5* IQR = 5487 +2450 = 7937;
- Q1 - 1.5*IQR = 3854 - 2450 = 1404.
Now, let’s see how many extremely potential outliers we have. Only two.

They are from those days:
The most interesting thing is even when new rank requirements implemented on Junior Member rank, impacts of the one did not last for too long, and ranged from the end day of week 2018w37 to the first 3 days of week #2018w38.
Consequently, both of weeks #2018w37 and #2018w38 are not extremely potential outliers.
Anyway, those two weeks are still potential outliers because they are higher than the 74th quartile (Q3, at 5487).