James Beattie snatched Stanley a point with a 90th-minute equaliser in a 3-3 draw against promotion-chasing Burton having led twice.
Richardson said: "To be honest, if someone had said we would have got four points over Easter I would have bitten their hand off.
"We've got to take the positives that we kept going until the end and I thought we deserved the point and it could be a massive point for us.
"We know we need at least one more win as everyone around us is winning too and we are all scrapping for our lives but I'm sure we will get over the line.
"We've got plenty of character and spirit and it was mistakes for their goal and then I always know we have goals in us.
"If you want it to fall to anyone in the final minutes it's your strikers, and James Beattie has taken his goal well and now we have to focus on York next which is a massive game."