Pulling b/w data from an interface

I'm trying to pull some data from a bridge interface but am having some problems.

Anyone able to provide a pointer to get this working?

Get b/w-load samples

:global uload
:set uload ([interface monitor-traffic bridge1 once do= {get $"rx-bits-per-second"}] )

Any help would be greatly appreciated.

Solved my own problem. Order was backwards. Set after the the results.