RE: Can someone please explain"how these daytraders can make money with a 3 or 4 cent swing on the day.This dos.nt seem worthwhile"
you have got to be kidding, right??
3 or 4 cents gain on 100,000 shares is nothing to be sneezed at. Especially if you come back the next few days and repeat the process.
Earns them a pretty darn good living.