The past few weeks the quotes for the eminis have been really lagging whenever there is a spurt of activity, up to 10 seconds delay or it just freezes. I use Esignal for charting. This is really affecting my order entry trying to buy at bid or sell at ask, hence negatively impacting my trading. I want to check if anybody else noticed this before I send them a email.
Yes, happends frequently here. I keep a separate monitor up with the CBOT free mini dow book. My charting platform doesn't have LII quotes. Dow usually keeps up OK, except on Fed day, but ES lags every day.. You're not in the minority with this problem.