Hey dooglus:
Were you maintaining a 50 day list too, or not? Maybe too much work to maintain that many days, but this 20 day list is starting to seem a bit inadequate and also is starting to appear that little by little all of the top 20 days are being replaced by dates in 2017... maybe that is not a problem, but it would seem a bit more informative to have some older dates in the mix, as well, no?
I'm not actually 'maintaining' any lists. I'm recreating the list from scratch each day, relying on stats from bitcoincharts.com.
I make the list long enough to include the last day's price. If the last day's price is in the top 20 then I only post the top 20. Otherwise I round up to a multiple of 5. Once yesterday's price isn't in the top 50 I go back into hibernation...
I only recently came across this thread, but I find the concept quite interesting to post a top 20 of the daily average, rather than just what the price may have reached at any one snap-shot in time.
At the same time, it stirs in me a lot of other ways that similar questions can be post to give slightly differing views of the data... like I mention the top 50 daily averages. Also could be top 20 3 day averages or top 20 weekly averages... I know that any of this would be a bit of work, but just gets me a bit curious to think about those other variations on the data set and speculation about reading the time periods in different ways.