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Thanks Bill,
I haven't read that one for a while - I'll go back for a refresh but
as you say it isn't the point anyway.
I agree with your summation - nicely put.
brian_z
--- In amibroker@xxxxxxxxxxxxxxx, "wavemechanic" <timesarrow@xxx>
wrote:
>
> Brian:
>
> Your problem is not a problem. As noted in the article they do
describe how they developed their rating - comparison of close with
the exchange time and sales price. In the real world, the exchange
data is by definition absolute. If there are not other studies (I
doubt that there are), in practical terms one has to live with what
is provided. I have compared (not rigorously) Yahoo (CSI), Barchart,
and StochCharts, and found obvious differences particularly for
thinly traded volatile issues during volatile periods which
presumably reflects different suppliers. The key question is does it
make a difference? Probably not too much in most cases. My own
feeling is that absent an updated study and a reasonable way to
objectively establish which supplier is closer to "absolute" one is
best served by sticking with a large supplier and spending time on
improving analysis and trading rather than trying to figure out which
supplier is best. Trader/trading/money management/analysis/etc.
related errors are, I am sure, much greater than those created by
differences between supplied data and exchange time/sales data. As
long as equity increases at an "OK" rate, life is too short to sweat
the lesser stuff.
>
> Bill
>
> ----- Original Message -----
> From: "brian_z111" <brian_z111@xxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Friday, February 15, 2008 7:04 PM
> Subject: [amibroker] Re: AP's RT data feed - for MarkK
>
>
> > Thanks Bill,
> >
> > The problem I have with that article is that they don't say what
> > method they used to measure the error rate.
> >
> > I think that in the financial journals etc there would be reports
on
> > the efforts of academics to deal with the issue but would I
> > personally have the resources and expertise to do it myself.
> >
> > Since the data from the exchanges contains errors, and their
books
> > are closed, how could anyone know for sure how accurate the data
is?
> >
> >
> > brian_z
> >
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "wavemechanic" <timesarrow@>
> > wrote:
> >>
> >> Here is one study:
> > http://www.csidata.com/csi/reviews/reprintsep99.html
> >>
> >> Bill
> >>
> >> ----- Original Message -----
> >> From: "brian_z111" <brian_z111@>
> >> To: <amibroker@xxxxxxxxxxxxxxx>
> >> Sent: Friday, February 15, 2008 12:35 PM
> >> Subject: [amibroker] Re: AP's RT data feed - for MarkK
> >>
> >>
> >> > Steve,
> >> >
> >> > I would like to know how I can decide if EOD data is clean or
if
> >> > intraday data is up to the demands.
> >> >
> >> > It is a subject that I don't see much quality discussion on.
> >> >
> >> > For EOD data my best ideas so far are:
> >> >
> >> > 1) Data includes raw data - I can compare raw data to other
> > providers
> >> > raw data - I can't compare it to an absolute benchmark because
> > there
> >> > isn't one.
> >> >
> >> > 2) Data inlcudes a record of all split events and the
> > corresponding
> >> > split factor I can check the event records independently and
> > check
> >> > the math.
> >> >
> >> > 3) I can apply the split factor or see the results of it's
> >> > application so I can check the math.
> >> >
> >> > 4) The event calendar should inlcude non-trading days for the
> > market
> >> > and stand down trading days for companies.
> >> >
> >> > 5) Data can be padded or unpadded (optional).
> >> >
> >> > I can't think of any other way to measure data quality.
> >> >
> >> > I don't think any data provider meets the criteria - maybe a
few.
> >> >
> >> >
> >> > For intraday:
> >> >
> >> > What could I possibly do?
> >> >
> >> > Buy raw tick data from several providers, compare them for a
> >> > consensus and filter it myself ?
> >> >
> >> > I am at a loss on that one.
> >> >
> >> > Of course another option is to trade in such a way that bad
ticks
> > and
> >> > unclean EOD data don't affect the outcomes very much (that
could
> > be a
> >> > lot easier than the above).
> >> >
> >> > brian_z
> >> >
> >> > --- In amibroker@xxxxxxxxxxxxxxx, "scourt2000" <stevehite@>
wrote:
> >> >>
> >> >>
> >> >> Mark,
> >> >>
> >> >> No successful intraday real-time trader who does this full-
time
> >> > would
> >> >> ever drop eSignal for Gary's new real-time service.
> >> >>
> >> >> It's a pennywise and pound-foolish decision.
> >> >>
> >> >> He's fine for clean end-of-day data. But he's way out of his
> >> > league
> >> >> for the demands of intraday real-time trading.
> >> >>
> >> >>
> >> >> --- In amibroker@xxxxxxxxxxxxxxx, "MarkK" <MailYahoo@> wrote:
> >> >> >
> >> >> > Brian,
> >> >> >
> >> >> >
> >> >> >
> >> >> > So far I am very happy with the QP RT beta testing
> >> >> >
> >> >> > I believe that when it goes live they will be taking a lot
of
> >> >> customers away
> >> >> > from the other services
> >> >> >
> >> >> >
> >> >> >
> >> >> > It is a much better value than other things out there, and
so
> > far
> >> >> the data
> >> >> > has been accurate
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> > MarkK
> >> >> >
> >> >> >
> >> >> >
> >> >> > _____
> >> >> >
> >> >> > From: amibroker@xxxxxxxxxxxxxxx
> >> > [mailto:amibroker@xxxxxxxxxxxxxxx]
> >> >> On Behalf
> >> >> > Of brian_z111
> >> >> > Sent: Friday, February 15, 2008 7:47 AM
> >> >> > To: amibroker@xxxxxxxxxxxxxxx
> >> >> > Subject: [amibroker] Re: AP's RT data feed - for MarkK
> >> >> >
> >> >> >
> >> >> >
> >> >> > > I am looking for an RT data provider. I used eSignal for
a
> >> > couple
> >> >> > >of years, then quit and am ready to resart, but don't likr
> > their
> >> >> > >fees.
> >> >> >
> >> >> > QuoteTracker and LiveCharts have the $60 and $20 version of
> >> > eSignal
> >> >> > if you don't mind less backfill and fewer symbols.
> >> >> >
> >> >> > I have read of a few issues with LiveCharts but surely we
can
> >> > make
> >> >> it
> >> >> > work (a lot of the problems also came about because people
> > still
> >> >> > wanted it free after it changed to pay for play a year ago -
> > of
> >> >> > course it doesn't work if ou don't pay).
> >> >> >
> >> >> > A couple of users said it was slow - I don't know - I
haven't
> >> > tried
> >> >> > it yet but I will.
> >> >> >
> >> >> > brian_z
> >> >> >
> >> >> > --- In amibroker@xxxxxxxxx <mailto:amibroker%
> > 40yahoogroups.com>
> >> >> ps.com, "Ara
> >> >> > Kaloustian" <ara1@> wrote:
> >> >> > >
> >> >> > > Mark,
> >> >> > >
> >> >> > > I am looking for an RT data provider. I used eSignal for
a
> >> > couple
> >> >> > of years, then quit and am ready to resart, but don't likr
> > their
> >> >> fees.
> >> >> > >
> >> >> > > Would you elaborate a bit on AP. Never heard of them
> >> >> > >
> >> >> > > Tx
> >> >> > >
> >> >> > > Ara
> >> >> > > ----- Original Message -----
> >> >> > > From: MarkK
> >> >> > > To: amibroker@xxxxxxxxx <mailto:amibroker%
40yahoogroups.com>
> >> >> ps.com
> >> >> > > Sent: Friday, February 15, 2008 3:36 AM
> >> >> > > Subject: RE: [amibroker] New EOD data feed other than
Quotes
> >> > Plus
> >> >> > >
> >> >> > >
> >> >> > > Dan,
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > > I use QP for EOD data, and am happy with the fundamental
> > data
> >> >> > that they provide. Not sure there is another service that
> > offers
> >> > as
> >> >> > much in that area
> >> >> > >
> >> >> > > I also use Fast Track for EOD data. Some market internal
> > data,
> >> >> > no fundamental data to speak of, however the data has been
> >> > cleaner
> >> >> > than QP EOD day data. For Mutual fund data not sure there
is a
> >> >> > better service out there.
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > > Have been an e-signal subscriber for RT data now for 4
> > years. I
> >> >> > cancelled my subscription since they kept raising their
> > prices,
> >> > and
> >> >> > went to IQ feed. Used them for a month then they raised
their
> >> >> > prices. Luckily I was abe to beta test AP's RT data feed.
So
> > far
> >> >> > they have been very responsive on the changed needed to
make
> > it
> >> > an
> >> >> > excellent RT service, and at a reasonable price.
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > > I would suggest you get hold of Gary at QP and let him
know
> >> > about
> >> >> > your issue. I would think you will become a satisfied
customer
> >> > once
> >> >> > again
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > > MarkK
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > > ----------------------------------------------------------
> >> >> > ----------
> >> >> > >
> >> >> > > From: amibroker@xxxxxxxxx <mailto:amibroker%
> > 40yahoogroups.com>
> >> >> ps.com
> >> >> > [mailto:amibroker@xxxxxxxxx <mailto:amibroker%
> > 40yahoogroups.com>
> >> >> ps.com] On
> >> >> > Behalf Of Dan Clark
> >> >> > > Sent: Thursday, February 14, 2008 11:56 PM
> >> >> > > To: amibroker@xxxxxxxxx <mailto:amibroker%
40yahoogroups.com>
> >> >> ps.com
> >> >> > > Subject: [amibroker] New EOD data feed other than Quotes
Plus
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > > I've been using Quotes Plus data for the last 2-1/2
years.
> >> >> > Overall, I've been very happy with Quotes Plus data and
Gary
> >> >> Lyben's
> >> >> > (owner/president) responsiveness. That said.
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > > In the last few days, I've swapped several e-mails about
a
> >> > minor
> >> >> > billing issue (credit card renewed with different number)
with
> > a
> >> >> > woman in his billing department. What should have been a
very
> >> > minor
> >> >> > clerical issue left me feeling EXTREMELY angry and
offended.
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > > I vowed to switch my data feed from Quotes Plus to
another
> > data
> >> >> > feed as soon as possible. This is a major issue for me
because
> > of
> >> >> > the amount of AFL recoding involved, but I can no longer do
> >> >> business
> >> >> > with Quotes Plus.
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > > I need some options for other EOD data feeds. What EOD
> > service
> >> >> > are you using? What has your experience been? What are the
> >> >> > alternatives now?
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > > Thanks and regards,
> >> >> > >
> >> >> > >
> >> >> > >
> >> >> > > Dan.
> >> >> > >
> >> >> >
> >> >>
> >> >
> >> >
> >> >
> >> >
> >> > Please note that this group is for discussion between users
only.
> >> >
> >> > To get support from AmiBroker please send an e-mail directly
to
> >> > SUPPORT {at} amibroker.com
> >> >
> >> > For NEW RELEASE ANNOUNCEMENTS and other news always check
DEVLOG:
> >> > http://www.amibroker.com/devlog/
> >> >
> >> > For other support material please check also:
> >> > http://www.amibroker.com/support.html
> >> >
> >> > Yahoo! Groups Links
> >> >
> >> >
> >> >
> >> >
> >> >
> >> > --
> >> > No virus found in this incoming message.
> >> > Checked by AVG Free Edition.
> >> > Version: 7.5.516 / Virus Database: 269.20.4/1277 - Release
Date:
> > 2/13/2008 8:00 PM
> >> >
> >> >
> >>
> >
> >
> >
> >
> > Please note that this group is for discussion between users only.
> >
> > To get support from AmiBroker please send an e-mail directly to
> > SUPPORT {at} amibroker.com
> >
> > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> > http://www.amibroker.com/devlog/
> >
> > For other support material please check also:
> > http://www.amibroker.com/support.html
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> > --
> > No virus found in this incoming message.
> > Checked by AVG Free Edition.
> > Version: 7.5.516 / Virus Database: 269.20.4/1277 - Release Date:
2/13/2008 8:00 PM
> >
> >
>
Please note that this group is for discussion between users only.
To get support from AmiBroker please send an e-mail directly to
SUPPORT {at} amibroker.com
For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
http://www.amibroker.com/devlog/
For other support material please check also:
http://www.amibroker.com/support.html
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