Bryan Gunn's side beat the Bluebirds 2-0 to resurrect hopes of survival in the Championship and Marshall wants three more points on Saturday when Plymouth visit Carrow Road.
He said: "It's a huge game against Plymouth. They're four points ahead of us now and it brings them right back into it, and hopefully another couple of teams as well.
"It seems to chop and change every day. You think Cardiff are good on the road and you're thinking it's going to be a tough game and you're looking at other teams round about you as having easier games. But the way it turned out we got the points and they struggled, so it's going to be topsy-turvy right to the end.
"I don't think we're going to get any respite between now and the end of the season. There are going to be eight massive games and we just have to get our heads round it."