Average horizontal Line across the Bar chart

[thiamhuat2026]

how to have a average horizontal line across the bar chart with the display of the average value above the line on the left side?

[alish_b]

Hi @thiamhuat2026 ,

You could create a measure that calculates the average value and then pass that measure to the 'Value' in Y-Axis Constant Line using the fx button and in the Field value , select the measure in the 'What field should we base this on?' section.

Hope it helps!

[thiamhuat2026]

I should say mine is a bit tricky.. those values on each individual bar chart is based on some measure 

EDU_NoCarpark (%) =

DIVIDE(COUNT('tc_merged_gold'[CASE_ID]),SELECTEDVALUE('tc_merged_gold'[EDU_without_Carpark])) * 100, but I cannot find the create another measure of the average of EDU_NoCarpark (%)

[stoic-harsh · Accepted solution]

Hey @thiamhuat2026,

To add a dynamic average line to your bar chart, first create this measure:

Avg EDU NoCarpark (%) =
AVERAGEX(
    VALUES('tc_merged_gold'[TOWN_COUNCIL]),
    [EDU_NoCarpark (%)]
)

Then, go to Visualizations > Analytics (search glass icon) > Y-axis constant line > Value (select above measure) and click ok.

Looking at your base measure, SELECTEDVALUE() returns blank the moment more than one distinct value exists in the filter context, silently breaking the average measure. MAX() always returns a single value regardless, making your calculation reliable across all filter and slicer combinations.

EDU_NoCarpark (%) =
DIVIDE(
    COUNT('tc_merged_gold'[CASE_ID]),
    CALCULATE(MAX('tc_merged_gold'[EDU_without_Carpark]))
) * 100

Hope that helps.

Best,

Harshit

[stoic-harsh]

Below is the result (I took a sample data of Singapore Town Councils from internet):

Best,

Harshit

[thiamhuat2026]

can you share the link of where you get the sample data of Singapore Town Councils from internet?

[stoic-harsh]

Hey @thiamhuat2026,

First, I pulled the list of Town councils (19 or so, in count) from Wikipedia (link), then used your bar chart screenshot alongside that list to give ChatGPT and Claude more context. Claude ended up generating a cleaner dataset overall. I can also share the prompt if that's useful!

Hope that helps.

Best,

Harshit

[thiamhuat2026]

I am not sure if there is any bug in this, I select what I want, and there is no average or whatsoever, then it does not appear at all.

[thiamhuat2026]

My barchart is based on the Measure = EDU_NoCarpark (%), and I want to display the average value (horizontal line) of all those values on the bar chart. Thanks.