A time series line chart with an 'event' overlay

[Stuck1]

Hi all,

Not sure how to describe this, but I've a time series chart (weekly cost) and I want to add a series that shows the date of a visit. I was thinking of using the Line and Stacked Colum Chart Viz, but not sure how to organise the date of the visit so that it appears as a block that straddles the weekly cost. The purpose of the chart is to see if the weekly cost changes after the visit. 

Ideally I'd have these for small multiples so that I can review a cohort at a glance, but that doesn't look possible.

Hope that's clear. Thanks for any help.

S1

[amitchandak]

@Stuck1 , to me seems like new Measure driven data labels can help
Power BI- Measure driven data labels| How to use a different measure on label| Some interesting visuals: https://www.youtube.com/watch?v=Y6G1Rj_O7XE