The Gunners have taken just 19 points from their 15 Premier League away games so far this season.
"We are playing to be in the top four. We are showing we are competitive with a good mentality," he told Sky Sports.
"We need to continue improving with the process. I cannot do it (with a click of my finger).
"It's a process but this team has a good mentality. We are improving, the table is giving us this answer.
"You can say two things. There is an amazing response at home, amazing. Big matches and big results, really, really awesome.
"Away we are sometimes doing good matches but in other moments the opposition is being more competitive than us."