The Eagles, who looked on course for a top-two finish earlier this season, are without a win in their last nine matches and still not guaranteed a play-off place.
They need a point against Peterborough on Saturday to be sure of a top-six finish and Holloway feels they will get it if his players perform as well as they did in Tuesday's goalless draw at Millwall.
"We've still got a fantastic chance," he said.
"We need one more point if results go against us and with a performance like Millwall I can see us getting it.
"We have got to get in there and then we will be hard to beat.
"I don't think we are anything like we were a couple of weeks ago when things were just going totally wrong. Let's hope we can give our fans something to cheer about with a shot at the play-offs."