Quote from OffShoreTrader:
Learner - do you know if esignal data is delivered in the same fashion?
No, it is not the same as that of IB. I have been using eSignal
for a number of years and can compare their data with the
local Japanese broker's data and also with Reuters. There
is no lag whatsoever and I have never found it to miss a
tick. And I can recall only 1 outage, which as I remember
lasted only a few seconds.
I have heard how IB's data is delivered and how that causes
ticks to be missed. However, I question if that is also the case
with their data for Japan which is supplied by GL Trade. I don't
use IB's charts as they are light-years behind eSignal's. But
I do use IB's Booktrader and do not notice missed quotes or
bids/offers as far as the human eye can catch.
OK, I just compared an IB 1 minute chart for all of today with
eSignal's. Exactly the same. True, there may be missed ticks
within the minute, but if that were so, you would most likely
find a different high or low at least once during the day.
But none exist.
Hope this helps.