[Havoc]

Not free, but Europeans can sign up with interactive brokers UK and the pricing is very good for US markets.

>Paying 7,5 EUR to 15 EUR or more for each transaction gets old quick.

Even if there was a free service in Europe I'm not sure I'd use it due to concerns about fill & execution quality. Or to use an IT analogy...if you're not paying you are the product. In this case via order flow being sold.