The Moroccan striker remains down the pecking order under Arsene Wenger and could be on the move in January if his game time does not increase.
"After Robin van Persie left, I thought I'd play more," he told French radio station RMC.
"The competition is always a little hard in a club like that. I expected it. It's [up] to me to prove myself. But, in two [to] three] months If nothing changes, I must make a decision.
"With the departure of Robin, I'd say that I had a playing card. And if my playing time doesn't change, I'm not fooled, I'll go away."
And Chamakh also hinted that there was a possibility of possibly returning to old club Bordeaux.
"Bordeaux? it could be a solution, if I decide to go. But my priority is to stay at Premier League," he added.