On the notable victories or whatever it's called on each player's page, currently no play has a best ever rank (only a current rank). I assume this is because nobody has been ranked twice (been unranked then ranked again). It would make more sense to change this so that it says your best rank no matter what, otherwise one column of the box will remain redundant indefinitely.
Real Time Ladder 'Best Victories': 3/29/2014 18:49:19
The "Best Rank" and "Best Rating" fields are not yet enabled for the real-time ladder. It would be silly to enable these on a new ladder, since the first person who gets a rank would automatically get a "Best Rank" of #1 even though they didn't earn it.
Once the ladder stabilizes they'll be enabled. Maybe a month or so.
Real Time Ladder 'Best Victories': 3/29/2014 19:36:36