Max y-axis based on field parameter selected

nleuck_101 here you go, change table and column name as per your model:

Measure = 
--parameter table name and parameter column name you are using on slicer
VAR __SelectedParameter = MAXX ( ALLSELECTED ( Parameter ), [Parameter] )
//this would be table and column that you are using on x-axis, 
//for example if it is a year column from date table then this would be
//ALLSELECTED ( 'Date'[Year] )
VAR __Table = ALLSELECTED ( 'Calendar'[Month Sort], 'Calendar'[Month] )
RETURN
//so depedning on the paramter name selected, you just switch to that measure
//in my case I have paramter with two name Qty and Sales and these correspond to 
//[Qty] and [Sales] measure, make changes to switch statement as per your model
SWITCH ( 
    __SelectedParameter,
    "Qty", MAXX ( __Table, [Qty] ),  
    "Sales", MAXX ( __Table, [Sales] )
)