A goal apiece from Steve Palmer, Tony Thorpe and Kevin McLeod clinched a comfortable win for the R's, but Holloway warned his players that they have not achieved anything yet.
"What is the point of looking at the league table because we are still only halfway through the season," he said.
"If this was a marathon we would still have 13 miles to run and that is a hell of a long way to go.
"It does not matter where we are now, it only matters where we are at the end of the season, but we are on the right lines and we are getting stronger and stronger."