Fulham have one win in 10 Premier League games following Saturday's 4-2 loss to Manchester City and Richardson hopes to turn the momentum in the final two away matches before the year's end, with a trip to Hull following the Canaries clash.
Rene Meulensteen's men also play West Ham and Sunderland in a sequence of fixtures which appear, on paper at least, winnable for a Cottagers' side which made City work hard for victory.
"The next four games are very, very important for us," Richardson said.
"They're all bottom half clubs, all winnable. We want to take each game at a time, but the next game against Norwich, we want to win that game. It's a must-win for us.
"You've always got to beat the teams around about you. You try your best against the top, top teams, but the teams around you, they're the times when you're picking the points up.
"We're playing free football, with confidence, attacking-wise. I think it's only a matter of time before we get results."
Richardson was drafted in to play on the left wing for his first appearance under Meulensteen and rewarded his former coach at Manchester United with a goal.
Like Adel Taarabt, who performed well in the loan striker's role, Richardson has found chances limited this term, but now hopes to seize his opportunity.
He added: "Sitting on the sidelines, you don't want to be sitting there, you just want to be out on the pitch playing.
"Sometimes when the manager does that, it gets the fire back in your belly. Maybe that's happened to him (Taarabt) and me."
Fulham's cause could be boosted by the return of Clint Dempsey, who watched the City clash from the stands.
Dempsey was prolific for Fulham before moving to Tottenham and then Seattle Sounders, but is poised to return to Craven Cottage on a loan deal prior to the start of the Major League Soccer season.
Meulensteen said: "I don't think he's officially signed. He's here for medicals, they are looking at him and the paperwork and this, that and the other.
"Everybody knows what Clint is about and the years that he spent here. He is an out-and-out winner. He gives you that timing to arrive in the box.
"At times I thought we played really well, we got some really good balls into the box and then it's just that you're expecting something from players in other positions when normally, the real box players will get there. So hopefully Clint can give us that."
Meulensteen has spoken to Fulham owner Shahid Khan about other January acquisitions.
The Dutchman said: "We've had good, open discussions and what I can say is that whatever the help, the support is needed, we will get it.
"I don't know whether it's a loan or a statement signing. It's more important that he (Khan) has fully committed to the support of Fulham and he will give everything that we need to make sure that we stay up."