Now I got the surprise that 80% from the original amount was eaten not only from commissions but also from Taxes.

What an idiot! I couldn't believe that for every transaction, FxFlat is taking a part from "Kapitalertragsteuer" (Tax) directly.

I was thinking that ~25% of the traded amount has to be reserved for taxes.

But it seems more than that!

I have an other account with IB and I am afraid to get a similar tax requirement after a year of activity.

I think, I will concentrate on my IT-company. Living from trading is onla an utopy, at least in Germany...

It all comes down to one thing really-how many ticks are you targeting?
And if it's just a couple then the next question is "can I scale up to a full contract?"
If you're trading micros then yes you're going to get nailed.
This drops away with a full contract, same with Es-$5 a full point jumps up to 50. Not sure the difference on Nasdaq but if you work out the percentages then I'm sure you'll get a happy surprise
Micros are only really for practise IMO
Edit-sorry I meant that Micros are only really for practise if scalping for just a few ticks. If you're averaging 20-30 ticks profit then they're certainly more than handy.