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Dick:
As I recall, there was a discussion on this board a
year or two ago about the fact that Yahoo limits downloads to 200 symbols and
that multiple downloads were required for larger numbers. If so, asking
for 6000 symbols might have been the cause for the disruption and holes
that you saw. I download less than 200 symbols and over several years
experienced only one time when I could not download and that lasted for a couple
of days when their servers died, as well as one day while the downloading
software was tweaked to match a change made to their servers. As a
result, problems beyond that (i.e., exceeding Yahoo's restrictions
(whatever they are) and server malfunctioning or change) are obviously not
Yahoo related, as evidenced by the fact that downloads (current on weekdays and
historical on weekends) were effected at all other times with the setup that I'm
using. Works well for my purposes and it sounds like working with a fewer
number of symbols is now working for you.
Bill
----- Original Message -----
Sent: Tuesday, December 28, 2004 9:41
PM
Subject: [amibroker] Re: Data
Updates
Bill,
Thanks for your interest. No, I do not
currenmtly download a large
number of stocks from Yahoo. I was
downloading about 6,000 daily on
a historical basis (until the problems).
I found that when using
Current it would miss data from stocks so had to
use Historical to
fill in. The MSOdat downloads (about 6,000 stocks)as a
FTP file so it
is really quick. We have gone through periods with Yahoo
where they
would cut us off and sometimes it was days before we could
update.
They have been pretty good of late. I still download the
Indexes
and .OB and .PK stocks(very few) from Yahoo and haven't any recent
problems.
Dick H.
--- In amibroker@xxxxxxxxxxxxxxx,
"wavemechanic" <wd78@xxxx> wrote:
> Dick:
>
> You are
downloading a very large number of quotes from Yahoo. Were
you
downloading historical (CSI data) or current (Reuters)?
Historical
is very much slower than current because of the way the
server is accessed
and, imo, need only be done once per week (e.g.,
on weekends), if one
wants the final database to be CSI. I am on a
relatively slow dialup
connection and current downloads at a rate of
about 1000 quotes/min,
whereas historical is perhaps two orders of
magnitude slower. Both
data suppliers are quite reliable and the
majority of the current equity
and index quotes are available about
20 minutes after the market
closes. No significant problem after
operating in this mode for
several years. From your description, my
guess is that MSOdata's
servers operate like Yahoo's current server.
>
>
Bill
> ----- Original Message -----
>
From: areehoi
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Tuesday, December 28, 2004 2:19
PM
> Subject: [amibroker] Re: Data Updates
>
>
>
> Joe,
> I switched over to
AmiBroker about 18 months ago. I use the US
Stocks
>
database. With Yahoo it normally took from 1 hour to 2 hours to
> download (sometimes up to 6 hours). About the same for
MetaStock
> using their downloader. this is with dial
up. After a number of
> itermittent problems with
Yahoo I swithed over to MSOdata. It
takes
> about 3
minutes to download the 5,700 US Stocks database. You
then
> parse the downloaded ASCII data into AmiBroker though the
Wizard
> (about another 5 minutes). Just a suggestion
as Yahoo is
> unpredictable.
>
>
Dick H.
>
> --- In amibroker@xxxxxxxxxxxxxxx,
"jdupcak" <jdupcak@xxxx> wrote:
> >
> >
> > I am new to AmiBroker and
am finding my way. I am having a
problem
> >
updating my end of day data. I have two data sources, one is
> Yahoo
> > Historical data
using AmiQuote and the other is Metastock using
> >
Downloader and the Metastock Data Plug-In. The problem is that
> each
> > auto update takes
hours. Both data bases work just fine except
for
> > the time it takes to roll in the new day's
numbers.
> >
> > Here are my
particulars: AmiQuote 1.69, Amibroker 4.6
>
Professional,
> > Pentium IV with XP, and cable internet
access. The slowness
> > shouldn't be associated
with my equipment of internet access.
> >
> > I suspect I am doing something incorrectly.
Any lessons
learned
> are
> >
appreciated.
> >
> > Thank
you ahead of time for advice.
> > Happy New
Yesr
> > Joe Dupcak
>
>
>
>
>
> Check AmiBroker web page at:
>
http://www.amibroker.com/
>
> Check group FAQ at:
http://groups.yahoo.com/group/amibroker/files/groupfaq.html
>
>
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