Its a relative measure of everyone. Since theres no actual MPS, you have to score higher than about 55% of the candidates.
During the exam, the paper is your friend. the person next to you is your enemy :))
that becomes irrelevant though if you score 70 percent or higher 
i am wondering if the percentile take into account the practice question AND the mock exam scores?
IT’s both. I can see my % move with each practice question and each mock I take.
Both of them yes
I don’t think it’s completely accurate until you’ve completed everything.
If you’re someone who only took the practice questions and mocks once without any notes you are probably actually doing better than what your percentile says because people can reset the questions, use notes, etc. Saving mock B for Thursday as the final mock before the big day.
That percentile metric is not a good way to evaluate where you are at. There are a lot of people out there resetting categories and redoing mocks and problems. Also some people take the topic tests/mocks open book. I’ve also noticed that I can answer 10 questions correct in a row, back out to the home screen and my overall percentage relative to others will decrease. It’s pointless to have it there
this is true. Only you know if you cheated on mocks, used notes, did open book, went over the time limit, didn’t start it reasonably early in the morning etc.
however, instead of thinking about MPS. People should just focus on 70 or better because that’s were you are guaranteed to pass.
Is it a fact that 70 is guaranteed pass? Has CFA stated this or has is it one of those unwritten rules? I imagine the MPS has never been 70 or above so maybe that is where that originates from?
MPS has been above 70 a few times … according to CFA rep:
https://www.reddit.com/r/CFA/comments/8qv1bi/i_am_peter_mackey_developer_of_the_cfa_exam_ask/
Mock A AM : 73%
Mock A PM : 72%
Mock B AM : 73%
Mock B PM : 63%
Got absolute destroyed in Private Equity in Mock B PM. I found the Equity part difficult as well even though Equity valuation has been one of my stronger areas.
“a few times” ie in the 1970-80s when the pass rates were like 70 percent LOL I am not going to explicitly state whether I view a guy in his 60s plus who has “CFA” after his name on his business card that obtained it in the 1970s or 80s has an equally valuable charter as someone who clears LIII this year and is granted the charter.
After all, that would be an ethics violation right?