Fresh from last weekend's 3-1 win over Coventry City, McCall's men will go into their fixture with Oldham looking to try and extend their unbeaten start to the league season and possibly make it back-to-back home victories.
Although the Bantams eventually came out on top, their match with Coventry was far from plain sailing, with the visiting Sky Blues causing McCall's side a number of problems in the first period.
McCall was in the crowd at Deepdale to see Oldham's 2-0 midweek loss to Championship side Preston North End in the EFL Cup round two.
Despite the defeat for the Latics though, McCall feels he saw enough from Saturday's opponents to suggest City will have to be prepared for another tough contest on home soil.
McCall said: "I was at Preston (North End) on Tuesday to see Oldham's game and they were unfortunate to lose.
"As we saw with Coventry last Saturday, each team in this division brings their own challenges.
"You only need to take one look at Oldham's defensive record, they haven't conceded a league goal since the first game of the season.
"This might mean that, like last Saturday, we have to be a bit patient and wait for a breakthrough at the weekend.
"On top of their defensive qualities, I'm fully aware of Oldham's attacking threats as well.
"I know one of their strikers, Lee Erwin, very well after giving him his debut up in Scotland with Motherwell.
"Another player up front for them, Billy McKay, is someone else we are well aware of after scoring a lot of goals in Scotland.
"I think Stephen (Robinson, Oldham manager) has done a good job there so far, especially when you consider the fact that they only had a handful of players under contract when he first joined the club.
"He seems to have build a good squad, a decent blend of youth and experience.
"As with all of our home games, we will look to stamp our authority on the match as soon as possible on Saturday.
"We know that this isn't always easy though, and that you might have to find different ways of achieving your end goal.
"The players have a role to play in taking the game to the opposition and lifting the crowd but, equally, the fans can lift the players as well, especially if there is a lull in the match.
"I think that feeling of togetherness between the fans and the players is going to be important for us throughout the season.
"We know things won’t always go for us, like the first half last Saturday.
"We can’t dominate games for ninety minutes, we know there will be times when the opposition have their good spells, but the fans and the players can work together to turn it around."