The former Dundee United, Aberdeen and Livingston star has featured as a trialist for the Coatbridge side in recent weeks and is in line to face Queen of the South this weekend.
Rovers are at the foot of the Irn-Bru Second Division and boss Todd Lumsden is eager to add to his attacking arsenal.
He said: "We are still negotiating to see if we can get Robbie signed.
"He can still play one more game for us as a trialist so hopefully he will either do that or play as a signed player against Queen of the South.
"We are still trying to get that one done.
"Scott Sally has signed, which is good.
"He has had a chest infection and was not feeling too clever but he will be okay, hopefully."