Promotions - 2 for 1/ Buy 1 get 1 free

[KarlDD]

Hello Forum,

I have set up a promotion so that if the customer buys a product with a certain id they'll receive another of the same product free of charge.

It works fine when it is just one product being purchased but the promotion doesn't multiply if they order 2 or more.

Is there a way I can get this to multiply for each product ordered or is that not possible?

Thanks in advance,

Karl.