I'd say ORD EMJ FO will see some good movement:

With 59 ERJ airframes based in ORD and staffing 5 crews per plane that would mean the company wants a total of 295 ORD ERJ FOs. Currently, only 274 ORD ERJ FOs on the list. The Jan 17th newhire class had 6 OFE slots, Jan 31st class will have 5 more, and a vacancy bid just came out for 17 additional OFEs. I'd expect to see a steady diet of OFE openings for newhire classes in the next few months, maybe 3-6 per class.

So you can definitely see there is some movement already for the bottom of the list, and additionally there will be movement at the top of the list with the senior ORD ERJ FOs bidding for upgrade opportunities on the ERJ and CRJ in ORD.

Good luck on the checkride!