I have been using this mod called "Accountant" for a long time.. but it seems it may be abandoned... it sis now completely broken in the latest patch.. and while I hope it will be updated... I would like to look into sme alternatives with a similar use case.
https://www.wowinterface.com/downloa...tant.html#info
This is the mod I am talking about (Though I have also tried the Curse Version as well)
Basically it is a gold info window. Shows you how much per session, week, month.. what you have on alts. If it is coming from loot, quests, AH, other players... etc etc