I need to show a bar chart where the sorting needs to be based on 2 columns
- Deal probability – Descending
and then by
- Current Month Closure Probability
If I add these 2 columns 1 below the other in the sort box, it is still sorting by Deal probability alone.

You must combine both columns into a single numeric sort key.
1. If Deal Probability is text like:
High
Medium
Low
Create a calculated measure mapping first:
example :
✔ Result:
First sorted by Deal Probability (DESC)
Ties resolved by Current Month Closure Probability