In week 15, Luton will face Arsenal tonight, and in my opinion this will be an easy match for Arsenal to get 3 points even though they will play at Luton's home ground and will continue their victory.
However, after the match against Luton Arsenal have quite a tough schedule towards the end of the year. And they will face Aston Villa and Liverpool, two of the top four teams, as well as Brighton and West Ham United throughout December.