To show the current blinds, you'll want to use these tokens: <smallblind> & <bigblind>
For the next blind level, you'll need to use these two: <nextsmallblind> & <nextbigblind>
If blinds are currently 5/10 and they will next be 10/20, and you want it to show as this:
Blinds: 5/10
Next: 10/20
Then the code you want to use in the cell displaying this is: Blinds: <smallblind> / <bigblind><br>Next: <nextsmallblind> / <nextbigblind>
Now, if you already have a cell set up this way, but it's not showing on the break, make sure that you go through the conditions for all that include "break", and that "hide cell" isn't checked.