statistics only for select time frame?

i was wondering if there’s a way to show statistics only for a certain time frame. in my case i’d want it to be the last month-ish. i tried changing the x-axis of the goal, but that didn’t have any effect on the statistics as far as i could tell.

my duolingo goal is currently set at 200xp/day, but i consistently need to ratchet it down to 7 days, often after a single practice. i only started to get so intense with it recently, so the statistics of the whole graph are useless for trying to figure out my new, recent, average.

(i guess i could do an excel export and calculate it there, which i’ll probably end up trying if no one has another solution.)