Ok Phong, after some more fiddling, it doesn't seem to graph in real time, however it graphs based upon the datalogs that you retrieve, the ACjr might not do as much as the 3, but what I did was go to Database --> Retrieve Data logs, and Reports --> Graphs.
Again if that works for you great, if not, sorry like I said I'm hooked via ethernet, should be the same in principle, but you might have less memory etc to do whatever.