Dynamically Changing Y Axis : Clustered Column Chart

when you press on visual , you will be able to format the visual , go to y-axis and tehre is range 

create a measure

y_max = if( maxx(all(date[yearmonth]),[your measure]) < 0.55, 0.55,1)

this measure means that if max of your measure is less than 55% , then the max axis is 55% but if it is greater then max is 100%

now when you go to format , and y-axsi ranges, you will find max and min and next to them an fx button , press on fx of max and choose this measure