Jamille Matt and Ryan Crowther both scored their first League Two goals for the club before substitute Jon Parkin added a late third as Fleetwood put back to back defeats firmly behind them.
Alexander said: "We wanted to improve on our last performance at home and we certainly did that,
"We wanted to be more competitive and I think we got the rewards for the effort we pit in.
"Every one of the lads was fantastic and the result was deserved.
"It was a hard-working, intense and professional performance.
"We want to get the basics in place and that includes teamwork and a team ethic and we've seen that."