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Jason,
Thank you for your assistance. I'm going to switch off Yahoo! and go
to a paid service for cleaner data. I'm implementing your code that
you posted about a week ago on industry and sector analysis. This is
good stuff. Can I ask you if you've used this code before or
something like it for decision making? Do you like it? Was it
inspired by the latest Stocks & Commodities issue? Thanks again.
Ed
--- In amibroker@xxxxxxxxxxxxxxx, "Jayson" <jcasavant@xxxx> wrote:
> Ed,
> I use QP and am satisfied. While not perfect it tends to be very
clean.
> Every one has a different approach but I set parameters in QP that
can only
> be met with clean data (min vol, min price, institutional ownership
etc) I
> save my filtered universe then import that list to AB and use that
list for
> my testing/development. For the price yahoo is good but when
problems arise
> who do you complain to? QP is not free, neither is TC2000 but both
offer
> good clean data...
>
> Regards,
>
> Jayson
>
> -----Original Message-----
> From: Ed [mailto:vvsignin@x...]
> Sent: Tuesday, April 27, 2004 8:44 PM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: [amibroker] Re: Trouble with data for indices created by
Add To
> Composite function
>
>
> Jayson,
>
> Thank you again for your response. I'm not clear what you mean by
> other data options. I currently download from Yahoo. Do you
suggest
> another site? Thanks.
>
> Ed
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Jayson" <jcasavant@xxxx> wrote:
> > Ed,
> > Yes the holes are likely in the data that make up your
composites.
> As I
> > understand it Purify simply compares trading days to a reference
> symbol.
> > Choosing a symbol you trust such as QQQ or DJ30,CSCO etc,
should
> do the
> > trick. from help....
> >
> > Database purify tool implemented (available via Tools->Database
> Purify)
> > allows to detect missing/extra quotes, possible splits, invalid
OHLC
> > relationship
> >
> > Apply to/range settings similar to AA window. You can also right
> click over
> > result list to add symbols to watch list and copy the list to
the
> clipboard
> > (and paste it later to any other program for futher use)
> >
> > The tool is designed to identify problem areas, not to delete
the
> offenders.
> > If you are finding lots of problems you may wish to look at
other
> data
> > options..
> >
> >
> >
> > Regards,
> >
> > Jayson
> >
> > -----Original Message-----
> > From: Ed [mailto:vvsignin@x...]
> > Sent: Tuesday, April 27, 2004 9:27 AM
> > To: amibroker@xxxxxxxxxxxxxxx
> > Subject: [amibroker] Re: Trouble with data for indices
created by
> Add To
> > Composite function
> >
> >
> > Jayson,
> >
> > Thank you for your response. FYI the ticks that are erratic
have
> > consistent dates, but I'm assuming that you're talking about
those
> > symbols that make up the composites that I've created having
> holes. I
> > did clean out all of the dead symbols and those symbols that
don't
> > have up-to-date data. I will check the symbols manually
myself.
> Also,
> > when running the purify tool, it seems that it is simply a
> reporting
> > tool. Is this correct, or does the purify tool actually fix
data?
> > Lastly, when running the purify tool, can you tell me
> what 'Reference
> > symbol' I should be using? Thanks again.
> >
> > Ed
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Jayson" <jcasavant@xxxx>
wrote:
> > > The deviations are likely caused by data holes in the
underlying
> > data. You
> > > could try using the database purify tool to clean up your
> database
> > then
> > > rerun the composite code to correct your indexes..
> > >
> > > Regards,
> > >
> > > Jayson
> > >
> > > -----Original Message-----
> > > From: Ed [mailto:vvsignin@x...]
> > > Sent: Monday, April 26, 2004 11:04 AM
> > > To: amibroker@xxxxxxxxxxxxxxx
> > > Subject: [amibroker] Trouble with data for indicies
created by
> > Add To
> > > Composite function
> > >
> > >
> > > I'm hoping to find a tip that can help me clean up the
> indicies
> > I've
> > > created with the ATC function. I've created about 200
indicies
> > from
> > > the Add To Composite function, however, about 1/3 of these
> > indicies
> > > have bad ticks, usually at the end of the graph or at the
> latest
> > > dates. What happens is the chart looks normal and then a
few
> ticks
> > > will deviate greatly. Is there a way to clean up these
> indicies?
> > > Thank you. Ed
> > >
> > >
> > >
> > >
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> -----------------------------------------
> Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
> (Web page: http://groups.yahoo.com/group/amiquote/messages/)
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