Arter is key to the Cherries and the boss says it is important that he continues his efforts in the middle of the park.
Howe said: "It is a difficult one with Harry at the moment because he is producing so many good performances and it is hard to single one out. For me, he was very good against Everton.
"From his perspective, it is great that people are having to compare excellent performances to see which one is best.
"When you look at his performances against Everton, Watford, Hull and Tottenham, he has played very well in this run of games and been outstanding.
"His challenge now – as it is with the rest of the squad – is to keep repeating these displays and hitting these high levels.
"If we can do that as a team collectively, we will have a very good chance to keep getting positive results."