Category
MultiBar Functions
Description
Percent rank among values
Syntax
Percentile(expr, count)
Parameters
expr  formula referencing bar data
count  formula specifying a number of bars
Notes
expr is calculated for each bar, then results are sorted (ranked) from highest to lowest.
The highest value is given a Rank of 1, the next highest 2, and so on.
Percentile is calculated as 100 * (count  rank + 1) / count.
For the highest value, this will always be 100.
For the lowest value, this will always be 100 / count (percentile can never be 0).
