Stanley have hit form at the right time with one defeat in their last seven games and Friday night's 2-0 victory over Morecambe gave them a massive lift.
Peter Murphy diverted Lee Molyneux's free-kick into the net after 28 minutes before Padraig Amond added a second as the hour approached to secure a vital three points.
"We just have to keep going," said Richardson. "We have put ourselves in a decent position but we have to make sure we get the job done.
"The onus is on us to win games now and if we do that we won't have a problem but it's still tight.
"Morecambe came out of the blocks quickly and they have some good individuals and we had to address it at half-time despite leading.
"In the second half, we addressed the problems at both ends and I think we had the momentum and deserved the win.
"We have just got to make sure we get more points than two more teams and that's the aim in the final two games."