You can check out: https://hnprofile.com/learn-more https://hnprofile.com/learn-more What it does is compare your "expertise" (loosely defined as how often you

You can check out: https://hnprofile.com/learn-more https://hnprofile.com/learn-more What it does is compare your "expertise" (loosely defined as how often you discuss a topic with technical aptitude), against other users "expertise". It doesn't matter at all how much or often you discuss a topic only whether or not your aptitude in discussing it is high; when discussing it. There is a limiting factor, however, if you discuss various topics too often; it'll drop your lower scoring topics you have "expertise" in. This is a storage saving mechanism. Regarding the handles, I just have the criteria it has to have posted within the last 1 year. Time does not degrade the expertise, only discussing other topics does (I believe there are 25 top topics the system tracks per user).