HiddenFetchInDays

Platform provides an optional tag to stretch the date range for retrieval beyond the user's search criteria. This is useful when you need to fetch data that might be disaggregated into current buckets by a BucketTransform, but does not itself fall in the user's date range. For example, let's say you have MONTHLY data starting May 1, with a BucketTransform to allocate this data using fairShare. If you search for May 10-15, you will get zero for this data measure, because it falls outside of the give date range. But if you add a sufficient HiddenFetchInDays, then it will fetch this data, so it can properly disaggregate into those buckets for May 10-15. (The user will still only see May 10-15, even though the internal retrieval went past this.)

So if the user provided the dates from 1 May 2018 to 31 May 2018 then data will be fetched from 25 Apr 2018 to 5 Jun 2018.