Show progress on a reactive stacked bar chart

Hi everyone !

I have a table representing different plants' growth week after week such as :

The column "Week" is calculated based on the current week (from today to 7 days ago is "W", 7 days before "W-1" and so on). Everything before "W-2" is labeled "W-X".

I want to display those values in a bar chart such as :

Which I was able to do using 4 measures, one for each week, like this :

W-X = 
CALCULATE(MAX('Fact'[Size]), 'Fact'[Week]="W-X")

W-2 = IF( CALCULATE(MAX('Fact'[Size]), 'Fact'[Week]="W-2") >0,
    CALCULATE(MAX('Fact'[Size]), 'Fact'[Week]="W-2")- [W-X],
    BLANK())

Up to W.

I check if the calculation is bigger than 0 because it means that the plant stayed the same size.

Then I used a parameter containing my 4 measures that I put on the X-axis of the stacked bar chart.

I added a slicer on the parameter so I could also see only the plants that have grown.

Now, my issue is : I would like to see the whole size (rather than only this week's) when I use the slicer.

Re-using the above example, when I press on "W" on the slicer, I only get this :

Which is how much the plant A has grown, but not its full size.

How can I get this instead ?

Best regards.