Wrong forum, moved to the correct one.
Read here about how to see which events fire (by enabling an overall event listener):
https://www.esoui.com/forums/showthr...ighlight=track
Hope that helps to see for you if any of these events fire as the bottom-right bounty counter updates.
Else look into ZOs code how they update teh bounty counter.
To find it use mertorchbug or zgoo, move mouse above the control and ype /tbm or /tbugm or /tbug mouse or /tgoo mouse to inspect the control's name and then search the beginning of it, or parts of it, in ZOs esoui source code.