Annual sparkline

This is how the annual sum would potentially look like . Stroke width seems excessive 🙂

Sparkline Line x Yr = 
// Static line color
VAR LineColor = "#01B8AA"
// "Date" field used in this example along the X axis
VAR XMinDate = CALCULATE(MIN('Calendar'[Fin Year]),ALL('Calendar'[Fin Year]))
VAR XMaxDate = calculate(MAX('Calendar'[Fin Year]),all('Calendar'[Fin Year]))
// Obtain overall min and overall max measure values when evaluated for each date
VAR YMinValue = CALCULATE(MINX(VALUES('Calendar'[Fin Year]),[Measure Value]),ALLEXCEPT('Calendar','Calendar'[Fin Year]))
VAR YMaxValue = calculate(MAXX(VALUES('Calendar'[Fin Year]),[Measure Value]),ALLEXCEPT('Calendar','Calendar'[Fin Year]))
// Build table of X & Y coordinates and fit to 100 x 100 viewbox
VAR SparklineTable = ADDCOLUMNS(
    SUMMARIZE('Calendar','Calendar'[Fin Year]),
        "X",INT(100 * DIVIDE('Calendar'[Fin Year] - XMinDate, XMaxDate - XMinDate)),
        "Y",INT(100 * DIVIDE([Measure Value] - YMinValue,YMaxValue - YMinValue)))
// Concatenate X & Y coordinates to build the sparkline
VAR Lines = CONCATENATEX(SparklineTable,[X] & "," & 100-[Y]," ",'Calendar'[Fin Year])
// Add to SVG, and verify Data Category is set to Image URL for this measure
VAR SVGImageURL = 
    "data:image/svg+xml;utf8," & 
    "<svg xmlns='http://www.w3.org/2000/svg' x='0px' y='0px' viewBox='0 0 100 100'>" &
     "<polyline fill='none' stroke='" & LineColor & 
     "' stroke-width='20' points='" & Lines & 
     "'/></svg>"
    
RETURN 
SVGImageURL

Here is another version that is a bit leaner. Keep in mind that the sparkline is not shown by year (or date) so the filter context is basically only the totals.

Sparkline Line x Yr = 
// Static line color
VAR LineColor = "#01B8AA"
// "Date" field used in this example along the X axis
VAR XMinDate = MIN('Calendar'[Fin Year])
VAR XMaxDate = MAX('Calendar'[Fin Year])
// Obtain overall min and overall max measure values when evaluated for each date
VAR YMinValue = MINX(VALUES('Calendar'[Fin Year]),[Measure Value])
VAR YMaxValue = MAXX(VALUES('Calendar'[Fin Year]),[Measure Value])
// Build table of X & Y coordinates and fit to 100 x 100 viewbox
VAR SparklineTable = ADDCOLUMNS(
    SUMMARIZE('Calendar','Calendar'[Fin Year]),
        "X",INT(100 * DIVIDE('Calendar'[Fin Year] - XMinDate, XMaxDate - XMinDate)),
        "Y",INT(100 * DIVIDE([Measure Value] - YMinValue,YMaxValue - YMinValue)))
// Concatenate X & Y coordinates to build the sparkline
VAR Lines = CONCATENATEX(SparklineTable,[X] & "," & 100-[Y]," ",'Calendar'[Fin Year])
// Add to SVG, and verify Data Category is set to Image URL for this measure
VAR SVGImageURL = 
    "data:image/svg+xml;utf8," & 
    "<svg xmlns='http://www.w3.org/2000/svg' x='0px' y='0px' viewBox='0 0 100 100'>" &
     "<polyline fill='none' stroke='" & LineColor & 
     "' stroke-width='2' points='" & Lines & 
     "'/></svg>"
    
RETURN 
SVGImageURL

Dellis81 

There was a small typo in the DAX you copied from lbendlin  - the colon was converted to text and needs to stay as colon when defining the VAR SVGImageURL = data:image See the screenshot posted by lbendlin  rather than the code that was altered when the html of the post was auto edited. 

Also, it looks like you are trying to make this work to display all years even when only 1 year is selected, so you need to use ALL (not ALLEXCEPT). lbendlin  I believe has not used a slicer to select a single financial year.

Finally, the measure below will find the MAX year in your Calendar table, but you may wish to use MAXX instead if you want max year that actually has data for it.

See if this measure below helps: replace the bit in RED below with an actual colon :