Line y axis independent from slicer

[MCacc]

Hello, 

I have a calculated column with a fixed number (95%), and I need to use this number in a Line-y Axis of a combo chart.

The dimension in my combo chart x-axis is Month. 

I also have a slicer Month, same field of my combo chart x-axis.

The field Month (used both in the combo chart and in the slicer) comes from my Calender table in relationship with my fact table.

The data generates three columns, one for each month that exisist. I want my line-y to not react to the month slicer, but I want it to be a straight line completely indipendent from my slicer choice.

I tried this measure:

My line-y axis := CALCULATE(MAX(Fact Table[Fixed Value]), ALL(Calendar[Month]))

However, when I select a month from my  slicer a dot comes out corresponding to my selection.

How can I avoid this beahviour?

Thank you very much for your support

[amitchandak]

@MCacc , Try like

My line-y axis := CALCULATE(MAX(Fact Table[Fixed Value]),all())

or use the measure in Y-axis constant line (fx) in Analytics Pane

[MCacc]

Thank you for your response but a) the measure returns an error saying ALL function needs at least one argument, and b) I can't use analytics pane because it's not supported for the combo chart. 

But thank you for the tips.

Any other ideas?

Thank you!