How to replace trendline with flashlight?

[#1]

Hi,

I have trend line as in attached. Instead of the trend line I would need to show flash lights.

Below are the items which I used

Chart : Combo chart

Dimension1: DaysRange

Dimension2: =IF(Mixmatch(MaxProduct,'Soaps'),MaxProduct)

Expression: =today()-aggr(Date(max(DateInsert)),ProductID)

Trend line: Count(DISTINCT {$<DateType={'InsertDate'},DaysRange={'22-31 Days','32-60 Days','61-90 Days','91+ Days'},Flag={2}>} ProductID)

I need to show the light only if it crosses 15-21 days and if I click on 0-7 days/2-14 days/15-21 days bars I don't want to see the flash light. Please let me know is it possible?

Please see attached withouttrendline for 0-7 days/2-14 days/15-21 days bars

Thanks.

[#2]

Please find attached.

[#3]

Any solution?