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[<FONT
face=Tahoma color=#000000>global_investor ] it
would indeed be an interesting feature to combine an intradaydatabase with
an EoD (timeframe daily) database.
<SPAN
class=359221710-19042004>
<SPAN
class=359221710-19042004>Something like this is now possible using Dingo's
script, just run it once after your daily data download and it will add EOD
stocks to your RT data base. You access these stocks with Foreign() type
functions. Dingo posted the code about a week ago.
<SPAN
class=359221710-19042004>
<SPAN
class=359221710-19042004>herman.
<FONT face=Tahoma
size=2>-----Original Message-----From: global_investor
[mailto:independent_opinion@xxxxxxx]Sent: Monday, April 19, 2004
6:06 AMTo: amibroker@xxxxxxxxxxxxxxxSubject: [amibroker]
Re: IQFeed Problem; Open & Low = O for last
day--- In amibroker@xxxxxxxxxxxxxxx, "Brian R."
<brian@xxxx> wrote:> Hi Ed,> > I did some testing
of IQFeed used with AmiBroker (AB).> > 1) You cannot create more
than one unique database in AB as long as > the database accesses
IQFeed. This means you have to choose between > a unique EOD database,
or a unique intraday database, but not both > (and I am not suggesting
combining these two databases into a single > database,
here).It's a little bit difficult to understand what you exactly mean
here.One of Amibroker's strengths actually is the ability to run
multipleAB instances simultaneously, while different AB instances could
accessdifferent databases.> 2) I tried using a free Lycos
EOD feed to use with a unique EOD > database in AB, but as long as I
have created a unique intraday > database in AB setup to use IQFeed, I
cannot access the Lycos feed > for EOD data. It may work the first
time, but if you shut down and > try it again, it will not work the
second time.> > 3) IQFeed is limited to 35,000 1-minute bars
(24 days) or 1,000 > daily bars (choose one of these, or choose hourly,
15-minute, > weekly, etc.). The 24 days worth of 1-minute data makes it
difficult > to use 200-day or 50-day MAs (not enough data). Since you
cannot use > an EOD database alongside an intraday database, you
essentially > cannot do any reasonable EOD indicator analysis if you
already have > created a unique intraday database. In essence,
the best approach > seems to be to use 1-hour or 15-minute data,
although that may be > too confining as well.it would
indeed be an interesting feature to combine an intradaydatabase with an
EoD (timeframe daily) database. For example, tocalculate
indicators based on daily data (for which long histories areavailable) and
then display these indicators in an intraday chart, oruse them in a
trading system with intraday data.But this would require a redesign of
certain parts of the Amibrokerarchitecture, I suppose.
> > 4) I created a unique AB EOD database with IQFeed, using
200 > symbols. I created another AB intraday database with IQFeed,
using > 300 different symbols (200 + 300 = 500 max symbols in IQFeed).
Since > IQFeed does not allow multiple databases, the test
failed.I don't fully understand your point here. As far as the
problem youdescribed in one of your previous posts is concerned (Open
& Low = 0,when base interval of IQFeed database is daily), it
obviously appearsto be a bug in Amibroker's IQFeed plugin, and NOT a
problem IQFeed isresponsible for.> > All of this left me
with a bad taste in my mouth. First off, I can't > believe none of this
has been previously documented, anywhere, by > the IQFeed service.
Well, I sent a bug report regarding the EoD problem to TJ already
acouple of weeks ago. So we can only hope that TJ fixes the bug in
theIQFeed plugin.> In addition, IQFeed's DLL files have a
tendency > to corrupt AB when you test certain data scenarios. This
means > repeatedly uninstalling, and then reinstalling AB and related
> components, in order just to test the limitations of IQFeed.
cannot confirm this.> Nevermind losing all of your custom
charts and layouts in the > process, since a full AB reinstall (i.e., a
complete deletion of the > previous install) won't understand your
backup chart and layout > files for whatever reason (someone smoking
too much crack?).> > I feel IQFeed is probably a good deal for
the money, but without > proper documentation the service is a complete
and absolute waste of > time. If everyone has to go through what I just
went through to > understand the real limitations of the service when
it's used with > AB, there are going to be a lot of ticked off IQFeed
customers. one of IQFeed's biggest weaknesses, in my opinion, is the
data qualityissue, given that the intraday (backfill) data is unfiltered
andcontains many bad ticks. I opened a thread on this topic
atElitetrader.com some time ago:<A
href="">http://www.elitetrader.com/vb/showthread.php?s=&threadid=29282While
I know that many IQFeed users fully agree with me and would liketo see
improvements (e.g. implementation of optional filters), mostusers
are unfortunately passive and don't voice their opinions.It would
clearly be helpful if more users (both IQFeed customers andprospects)
express their interest in the improvement of IQFeed's badtick
problem. A simple one-liner, e.g. "I'd like to see theimplementation
of optional filters, too" would help.The more users demonstrate their
interest, the higher priority thistopic is assigned by
IQFeed/DTN.Unfortunately, I'm not based in the U.S., but instead in a
non-Englishspeaking European country, so the easiest thing for me is to
open athread on this topic, ie. communicate in writing. It
would be farmore difficult for me to call IQFeed or the developers by
telephoneand propose possible solutions or persuade them to assign a
higherpriority to the bad tick problem.> Spending the $100 or
$150 a month for eSignal (500 symbols) is > probably entirely worth it,
based on what I am finding with IQFeed. > Well, I think that
eSignal would not solve all your problems either. For example, combination
of intraday data with longer histories ofdaily data wouldn't be possible
either, unless the Amibrokerarchitecture gets
changed/redesigned.Send BUG REPORTS to
bugs@xxxxxxxxxxxxxSend SUGGESTIONS to
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