I have but I never follow them for real at the moment. When I will have finished with some automations I will follow them. I know in theory that for indices with less digits it should be less precise. Same for actions so for spx/es the precision would be less than for Dow. Now it is relative to my system. I have somebody that follow the system for AXA (a french stock also quoted on NYSE) and he says that the precision is very good. As long as I didn't follow for real for at least six months I won't make affirmation. I just can say that it should work with less precision than with Dow. Now since every indices are synchronised to the milliseconds it could be possible to follow Dow and spx at the same time but I have to experiment this.
Quote from nkhoi:
Hi,
you have level for dow and cac40 but no SPX/ES? of these three ES/SPX is more popular here.

