Rangers brought in three new faces during the January transfer window.
Glasgow Rangers made a number of summer signings, but Stewart has questioned whether any have been worthwhile.
Glasgow Rangers are without a win from either of the Old Firm games they have played this season.
Celtic striker Leigh Griffiths is not guaranteed a place in the starting lineup.
Mark Warburton’s Glasgow Rangers are eight points behind leaders Celtic at the moment.
Brendan Rodgers’s Celtic should sign a defender and a midfielder, suggests Michael Stewart.
Rangers boss Mark Warburton has been criticised by pundit Michael Stewart.
Michael Stewart says Rangers need better recruitment to chase down Old Firm rivals Celtic.
Michael Stewart suggests that Celtic star Leigh Griffiths is a better striker than Derby County-owned Fulham man Chris Martin.
Michael Stewart seems to rate Celtic and Scotland international defender Kieran Tierney highly.