all the markets interact themselves in the same wave. I mean the big indices like SP, DJ, NASDAQ,
DAX, NIKKEI, and so on. US market lead the markets.
DAX just follows it.
DAX futures close at 22h spanish time.
DAX doesnt open overnigt 24h like SP futures. I dont know if european markets influence US opening. I dont think so. US news before the opening bell are more importants than what Europe did in the morning.