make a trend based on two measures

Hello Team,

I need help to resolve my issue.

I want to make  a trend of a measure, so i calculated two measure :

- Measure 1: Taux de disponibilité catalogue élargi passé ; for current measure, based on table 1

-Measure 2 : Taux de disponibilité catalogue élargi futur : for projected meausres, based on table 2

Prob 1 : I want to assign my measure 1 exclusively for my current day which is : 7 mai ( the day in snapshot day of table 1), so that i cannot see this measure on my grapfic for other days. (see graphic)

Prob 2 : When i try to drag just common period day to axis, i can no longer see the evolution of my measure 2 in time (14-mai till 18 Juin) ( see graphic below)

Your help would be precious. Thanks in advance