Ara,
For the sake of sharing information - to save people wasted
time:
> I know many are willing to to do a lot of work in order to
use free
>data from Yahoo or add fundamenttal info from
Yahoo.
It's no work at all.
Yahoo and Yahoo current fundamentals are
integrated with AmiQuote > AB
>>I have not tried it, but my
impression has been that what you get
>>is what you pay for.
Yahoo data is not free - it is paid for by Yahoo (bought from
reputable companies) from revenue from ads - it is distributed for
free to attract users to the site who then buy things via the ads (I
sometimes do).
>I would rather pay a reasonable fee and get a
reliable product.
How do we know that our data products are quality? -
because the
provider told us so?
How can we check data and how many
do?
It is not so easy to check data.
As I suggested to Barry the
other day - we can go to Yahoo, download
raw, or fully adjusted, get
dividend info, get split info and do our
own checks on Yahoo in the same
way we can do that for any other
provider. I have done one or two here and
there and I haven't found
anything alarming to me. If I did I would then
work around that.
What we can't get from Yahoo is event adjusted data
without dividend
adjustment - people who want that have to get it
elsewhere.
Also, sadly, for longer term traders, more error is
introduced into
backtesting by using data without div adjustment than
errors within
Yahoo's data (I only say that to help people).
IMO -
first we should know what our trading style is, second we
should have a
strategy in mind and then third we should buy data that
will give us the
best chance to analyze past performance of that
strategy (in my case that
means a few different types of data).
As you know I could give a couple
of pages more in support of traders
taking a more flexible and proactive
attitude to their data but I
would be better to do that at the
UKB.
One example:
I recently developed a very promising new
system on holiday - just
before walking out the door to catch the plane I
copied a complete AB
directory from an XP machine and dumped it on a Vista
laptop
(naughty, naughty) - I dumped all the old databases to get the size
down and only took a copy of Jim's US Yahoo database (I wanted div
adjusted data for EOD backtesting).
I managed to get some good
work done.
When I got back I then carried on towards testing in
intraday data
from another provider and so far it is performing exactly as
tested
on Yahoo (only better) - I am using intraday to finesse the entries
and exits that I couldn't finesse in EOD data. The trades average 2-3
days round trip.
Also when it is ready to trade I will be totally
familiar with it
after thousands of tests etc and I will see straight away
if
something is odd when I start going to the brokers (who also has a
different source for data).
Also consider that the so-called
differences in data is a bit of a
myth. In Australia there is only one
exchange - they have a monopoly
on the data. They do some filtering of the
tick data themselves
before releasing it to their providers so how
different can it be.
The only differences in data in Australia that can
occur are from a)
extra filtering or b) event adjustments.
At the
prices I don't think too many here are doing to mucn of a) and
b) is
checkable.
Also, as we have seen in a recent article, bad tick data
isn't the
end of the world at the EOD level.
In fact EOD traders
can tolerate quite a bit of error and still win
the
day.
brian_z
--- In amibroker@xxxxxxxxxps.com,
"Ara Kaloustian" <ara1@xxx> wrote:
>
> Dan, I am not sure
how other handle it.
>
> I know many are willing to to do a lot
of work in order to use free
data from Yahoo or add fundamenttal info from
Yahoo. I have not
tried it, but my impression has been that what you get
is what you
pay for. I would rather pay a reasonable fee and get a
reliable
product.
>
> About TC 2000, I beleive it is slower
than QP and remapping can be
a bunch of work and I don't care for their
industry mapping either.
>
> QP has been fine for me with very
few exceptions.
>
> We all meet some unacceptable service
personnel from time to
time ... I take it as part of dealing with people.
It's usually OK,
but sometime it is not.
>
> Sorry can't
really be of much help.
>
> A
> ----- Original Message
-----
> From: Dan Clark
> To: amibroker@xxxxxxxxxps.com
> Sent: Thursday, February 14, 2008 9:15 PM
> Subject: RE:
[amibroker] New EOD data feed other than Quotes Plus
>
>
>
Ara,
>
>
>
> Hi. It's been a long time.
>
>
>
> I remember that I did not like the industry/sector
info from
TC2000. I can remap the data if necessary. How do others handle
this?
>
>
>
> Thanks,
>
>
>
> Dan.
>
>
>
>
>
----------------------------------------------------------
----------
>
> From: amibroker@xxxxxxxxxps.com
[mailto:amibroker@xxxxxxxxxps.com]
On Behalf Of Ara Kaloustian
> Sent: Thursday, February 14, 2008 9:07
PM
> To: amibroker@xxxxxxxxxps.com
>
Subject: Re: [amibroker] New EOD data feed other than Quotes Plus
>
>
>
> TC2000 is reliable, but they do not have
fundamentals or very
few. (at least that's what I remember from a while
back).
>
>
>
> They do not have commodities and
charge extra for mutual funds.
Their data is ready earlier than
QP.
>
>
>
> Their industry / sector structure is
completely different tha QP.
>
> ----- Original Message -----
>
> From: Dan Clark
>
> To: amibroker@xxxxxxxxxps.com
>
> Sent: Thursday, February 14, 2008 8:55 PM
>
>
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.
>