It's a little more then a half tick per contract before commission. After commssions yes its about 4.5 euro. Is it good? That depends on who you ask. I think if you are a scalper and make a tick a contract that is a good day.
Is it because of the tick size of DAX is greater than that of STX, SMI and many others, so you choose it for scalping? If so, is ES better than the NQ?
Its due to the greater volatility and low exchange fees. The bigger tick size is nice but thats not why I trade it. When I say volatility I mean the average range in ticks.
i know quite a few scalpers, and i havent met one that thought in that kind of terms. Its the bottem line that counts for them: what they actually make.