How many Syrian refugees are moving to Afghanistan?

NONE. There is really no reason for Syrian Refugees to go to Afghanistan. Afghanistan is not near to Syria and getting there would be nearly impossible given the physical location of Islamic State, the borders between Kurdistan and Turkey, and numerous other intervening countries. Afghans do not speak Arabic; they speak Dari, Pashto, Uzbek, and Turkmen. Afghanistan has no governmental infrastructure to take care of refugees. Afghanistan is embroiled in its own struggle with the Taliban that has resulted in its own refugee exodus. It is not even on their radar.