Ok, so you have an speaker wire (2 wires to be simple), 50% of the time current is going one direction and then the other on both wires, not just 1 wire. So i ask you which way would you point the arrows when 1/2 the time the direction is wrong?
Please share with us what physical characteristic of a wire makes it directional? What is the secret to determining which way electrons prefer to go on a wire?