NRQL query returning only last 10 days of data even after setting the time period to last quarter

Hi ,
I am trying to find trend of application response time over a period of months by using below query, but the query returns only last 10 days of data.
Is it the query or something else?

SELECT filter( average(responseTime) , WHERE appName IN (appNames)) AS ‘appName Mobile’ FROM MobileRequest SINCE last quarter FACET dateOf(timestamp ) LIMIT MAX


This is related to your event data retention. You seem to have a Mobile Enterprise subscription; so you can see ~8 days of event based data in Insights:

You can extend event retention with a Insights Pro subscription too!