The Cottagers remain rooted to the bottom of the table, four points adrift of safety after losing 3-1 at home to West London rivals Chelsea at the weekend.
Richardson, who was a member of the West Brom side that stayed up against all the odds in 2005, insists all is not lost and knows they must beat second bottom Cardiff in a relegation six-pointer next week.
"The manager came in after the game and said 'it's gone now, it's finished. We've got to move on because Cardiff is a massive game'. And he's right," Richardson told the Daily Star.
"I know from what happened with West Brom that you can turn it round with a couple of results.
"There's 10 games to go - that's 30 points - a lot to play for."