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QA is happening as part of code review.

Indicator definitions: https://docs.google.com/a/dimagi.com/spreadsheets/d/1Ug09IcbogB9JyCIGS2vHV0kRTn2U_zO-Y9HRAinOpT0/edit#gid=1495052602

@emord @czue @esoergel 
no need to rewrite, but FYI, ESQuery objects are immutable, so you can assemble partial, shared queries and do this:
```python
user_query = UserES()
	.domain(domains)
	.filter({"ids": {"values": users}})
	.mobile_users()
	.show_inactive()
        .size(0))
users_after_date = user_query.created(gte=datespan.startdate, lte=datespan.enddate)
histo_data = users_after_date.run().facet('date', 'entries')
users_before_data = user_query.created(lt=datespan.startdate).run().total
```