Help with DAX measure for chart

Thanks v-sihou-msft for your suggestions.

No problem with point 1, I've understood :smileywink:

About point 2, yes I've got a One to many relationship between the two tables (one to many on Series ID), perhaps I didn't explain it well:

After selecting a serie from the Series Names filter, I'd like to display into my chart only value of datetime > selectedDate (where for selectedDate I mean the corresponding From_Date date of the selected Serie Name in the filter. I've almost reached the aim with this DAX measure, but I have used the "NOW()" date instead of the selectedDate

Serie Value = IF(HASONEVALUE('Table1'[SerieName]) && ISFILTERED('Table1'[SerieName]);CALCULATE(SUMX(FILTER(Table2; [DateTime]>NOW()); 'Table2'[Value]));BLANK())

How should I modify the above expression? If I try to substitute "NOW()" by Table1[From_Date] I've got an error :manfrustrated:

Thanks a lot in advance!