When I look at my profile, there's the following text. I think it's actually from an HN extension I use and not HN itself but I don't remember for sure: Averag

When I look at my profile, there's the following text. I think it's actually from an HN extension I use and not HN itself but I don't remember for sure: Average karma is calculated by averaging the scores of your last 50 comments except the comment with the highest score and your 5 most recent comments. It is generally recalculated every few days.