Stanley boss John Coleman told his players to ‘believe they are good enough' at half-time – and they proved they were at third placed Oxford.
The Reds came from 1-0 down to level through Billy Kee just after the restart and then Scott Brown scored the winner on his debut two minutes from the end despite the sending off of Tom Davies.
It means fourth placed Stanley are three points off Oxford and have two games in hand.
“I thought we were value for being level at half-time and I spoke at half-time and said ‘go out and believe you are good enough' and they showed me they were good enough," said Coleman.
“I have told them to act like promotion candidates and today they did.
“It's the fourth time we have gone behind, and we have come back and won two and drawn one, so it shows the character in the side.
“After Billy scored we were on the front foot and I have no complaints over Tom's sending off as it was two yellow cards.
“Brayden Shaw then had a great chance – his first touch in league football was almost a goal! – and then Scott Brown got our winner.
“I want to say a word for Seamus Conneely whose passing was great today, he showed calmness on the ball and he led by example. He showed you don't always have to shout to be a good captain."
Terry Gornell has a bad ankle injury picked up in training yesterday and Joe Wright jarred his knee in the first half at the Kassam Stadium.
“We have had to make changes but I have faith in all my squad although, with Joe Wright and Tom being sent off, we are short of centre halves for Tuesday's game against Notts County."
Coleman added: “There is a long way to go, we have a great set of lads with a great appetite for the game and the games will come thick and fast now. 50 point was the first target, we have now got there, and the next is 70 and that should see us in the play-offs.”