[Fwd: CME Data Files - Update]

[Carroll Slemaker <cslemaker1@xxxxxxxx>]

You wrote:

> I find that the time stamp is pretty accurate.  The problem is the > computer clock.  I set mine once a day to the Naval Atomic clock, and > then the timestamp is plus or minus 2 seconds.

I'm not sure what, exactly, you mean here by "time stamp".  I, too,
automatically sync my PC's clock to a time-server.  I do this once per
hour.

My point was not about inaccuracy, but simply that

(1) Omega's clock (the time displayed at the bottom of the Server window
and also displayable on a chart) is updated by a time transmission via
the data feed (not by your PC's clock), and

(2) this update occurs several seconds after DBC's own 00-second mark. 
I do not yet understand, though, exactly what this time (transmitted by
DBC) represents.

As for accuracy/timeliness, I have recorded the exact time, to the
second on my synchronized clock, when a price tick is received from DBC
and later checked the CME's time stamp for that same tick.  What I found
was that I received price updates about 6 seconds, on average, after
they are entered in the pit.

Regards,

Carroll Slemaker