Halfway through the season and the Reds are in a relegation dogfight along with all of their next four opponents, Southampton, Doncaster Rovers, Norwich City and Charlton Athletic.
Calderwood told BBC Radio Nottingham: "We're always in it to win it and we're going to get that winning mentality into the players.
"We're looking forward to Southampton and I think the away team is always the greater threat in a game like that."