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After that post I would like to also explain the other situation I found while
running both Signal-On-Line, PC Quotes, and DTN IQ.
Several times each day my feeds would stop usually around the same times each
day and this would require reinitializing the SOL data manager or the PCQuotes
manager. When these outages would take place I would run a tracert to the
respective server, and find that there was a server some place dropping the
packet and reporting a ridicules turnaround time. The problem was never between
me and my ISP or on my ISP's servers. Cable, ISDN, T1, etc will not solve these
problems as they are on the Internet at large not between my modem and the ISP.
These outages would occur mostly between 1100 and 1230, and then between 1400
and 1500. I also had my ISP provider ping and tracert the SOL and PC Quote
servers and they had the same returns. It seems that around 1200 is a very busy
period on the Internet, as a lot of lunch time surfing and e-mail take place,
and around the time kids get out of school they are getting on line and playing
the games on line and these eat up a lot of bandwidth.
The result is I use DTN and DTNIQ which DTN lets users have at half price. I use
DTNIQ as a back up eventhough it will not feed 2000i, I at least have quotes if
DTN or my main computer crashes and I also use the IQ news service all day.
I tried to evaluate the feeds and determine which suited our needs the best. I
will answer any questions I can.
____________________Reply Separator____________________
Subject: Re:Tick count ----> TS2000i
Author: Sentinel Trading
Date: 4/7/99 4:00 PM
This is correct, I ran Signal-On-Line side by side with DTN, this is what I
found watching OEX options like a hawk.
Signal had twice as many ticks as DTN and when comparing with the CBOE, over the
phone SOL had twice as many ticks at the last price than traded at the CBOE.
Signal sends each bid ask change as a tick, with the same last.
Signal also had trades that DTN did not show. This is what I tracked down on
that situation.
I would show a trade on SOL at 8 1/2 and DTN was at 10, upon calling the CBOE
and getting the trade report I found that the 8 1/2 trade occurred at 8:35 CST
and the report time was 9:45 CST. Signal sends these late reports as a current
trade, DTN filters the late reports out so they are not sent. Thus you would
miss the 8 1/2 tick, but it would not cause you to hit a stop at 9:45 that
should not be hit. The floor traders see these late reports and there is a note
attached we don't see the note on SOL, or DTN therefore I don't want to see the
late reported tick at all.
They also account for some of what we call bad ticks.
These situations make tick counts useless for comparing data feeds IMHO.
I found the situation with SOL unacceptable for my trading and stuck with DTN,
2000i will show all those bid ask changes as a new last tick, as that is how
they are sent. I spent 2 months comparing feeds, and ran as many as 3 at once on
separate computers.
What I want from a data feed is the prices I can currently fill at, so I need
the most recent bid, ask, and last. Late reports etc. are of no use to me.
I spent the money and ran PC Quotes, Signal-On-Line, DTN RT, DTN IQ, and BMI.
____________________Reply Separator____________________
Subject: Tick count ----> TS2000i
Author: tagteam@xxxxxxx
Date: 4/7/99 3:08 PM
It appears that, with respect to comparing the number of ticks,
TS2000i users need to take B/As into account. TS2000i stores B/As
separately. If you pull up the 1-tick trade record for DSP, for
example, you'll get just that......trades. You have to add in the bid
and ask records as well. When I did so, I was much closer to the
Bloomberg count of 4371 mentioned in Dave's post (I had 4273 ticks for
DSPM9 on 4/6......4099 trade records, 174 total B/A records).
Best regards,
Jim
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