Dow or Nasdaq: who leads ?

[Joao Paulo Ferreira Fortes]

Hi all, 

I've just started trading the Dow Jones 30, and it has a good average daily range, and is great for scalping.

Looking at the Nasdaq 100, both move almost in synch, and in the same direction.

For those experienced in these instruments, which one do you think is the leading Index? Dow or Nasdaq ? Who moves first ?

Thanks,

Jo.