As a user of analyses, I would like to have a Percentile function so that I can filter out atypical events when doing summary calls. The function would look like this: Percentile('attribute', 'timerange', value). This is related to enhancement request WI 44140.
This option is a must when you want to do some sophisticated analysis. It would also be great if it were added as a summary to RTQP and the Web API.