Selected date returns data + future + 12 weeks

Jiji0129 , if I select a date and need more than that, them My Slicer should be independent date table 

//Date1 is independent Date table, Date is joined with Table
new measure =
var _max1 = maxx(allselected(Date1),Date1[Date])
var _min = _max1 - weekday(_max1,2)+1

Var _max = _min + 7*12 -1
return
calculate( sum(Table[Value]), filter('Date', 'Date'[Date] >=_min && 'Date'[Date] <=_max))

Also check

Need of an Independent Date Table:https://www.youtube.com/watch?v=44fGGmg9fHI

Time Intelligence, DATESMTD, DATESQTD, DATESYTD, Week On Week, Week Till Date, Custom Period on Period,
Custom Period till date: https://youtu.be/aU2aKbnHuWs&t=145s

Power BI — Week on Week and WTD
https://medium.com/@amitchandak.1978/power-bi-wtd-questions-time-intelligence-4-5-98c30fab69d3
https://community.powerbi.com/t5/Community-Blog/Week-Is-Not-So-Weak-WTD-Last-WTD-and-This-Week-vs-Last-Week/ba-p/1051123
https://www.youtube.com/watch?v=pnAesWxYgJ8