not sure how i quite missed that on the first pass, but yeah eliminating the time factor or fixing the time factor is a good approach to fixing it…
i ran into a similar issue when i was exporting my docker logs… because i told it to extra the last 1 minute of every minute… and ofc it would not be perfectly accurate because of different server workloads and what not… so some log lines might get skipped or doubled in the appending exported log the command was created…
i ended up fixing that, buy simply taking 1 minute old data, instead of actual current data…
so instead of taking last 1 minute on the exact minute which touches the present and thus becomes unstable…
i took from 2 minutes ago until 1 minutes ago using whole numbers… that way i got perfect meshing of the appending in my live exporting docker logs.
not really the exact same solution here, but kinda the same problem in a sense…
i still hold that the period is to short… my node is 5 months and a bit more than half full… it would be nice to be able to see the graph for the full life time of my node and how it’s growth curve is…
i didn’t realize you had a solution for the tally issue… and just figured… if one plotted the avg graph over months and showing TBm would eliminate most of the confusion, with a solution i could come up with… 
yes thanks i understand, that apperently it might already be a solved issue, which would be great…
still if nothing else the graph could use a day/week/month/year scale selection…
my node has getting what… maybe 2TB ingess in the last month… thats from 11 to 13…
so even if the instability goes away, because of the scale… the graph just becomes an almost straigh line in most cases…
PS another weird thing i don’t understand is why sometime i can see who i respond to in the forum threads and other times i cannot… but i suppose i can just start to use the @ instead…
it shows that i responded to you when i edit, but on the forum i cannot see it… but maybe it’s just some browser update i’m lacking or whatever… i suppose i should go try another browser see if that helps
might be worth a shot…