I have been working with data purify and it is indicated missing quotes
for the recent QP3 database in several issues..I find that odd and a bit
sloppy...
With that said,when i go into quotes editor,and follow the specific
instructions,I can NOT add a missing quote.There is no ADD button,and the
instructions state to click anywhere but new..Iy appears to insert it,but it
does not...
Ami is a very powerful system tester,but it appears to be needlessly
complicated in some basic areas,and that is where I think newbies/non
programmers get their brains scrambled....
----- Original Message -----
From: Paul Ho
Date: Saturday, September 30, 2006 4:46 am
Subject: RE: RE: RE: [amibroker] Scan and Settings
To: [EMAIL PROTECTED]ps.com
> The problem of spikes and negative volume is not related to how
> far back in
> time. I use all available data personally.
>
> 1. Volume is stored as integer and negative volume is probably a
> resultof integer overflow. One way to solve the problem is to
> use V/1000 instead
> of straight volume.
> 2. Spike of other price data is probably due to data holes or dirty
> data. One way to detect the problem is store the number of
> symbols being
> added in the resultant composite so you can detect if some
> symbols are
> missing (data holes). Or pad and align all data to get rid of
> data holes.
> Other problem with spikes are harder to detect, you could try
> using the
> database purify function to weed out problem data.
>
>
>
>
>
>
>
> _____
>
> From: [EMAIL PROTECTED]ps.com
> [mailto:amibroker@yahoogroups.com]
On Behalf
> Of [EMAIL PROTECTED]net
> Sent: Saturday, 30 September 2006 4:33 PM
> To: [EMAIL PROTECTED]ps.com
> Subject: Re: RE: RE: [amibroker] Scan and Settings
>
>
>
> Thank you Paul,Terry and Joe,
>
>
>
> I have been having a bear of a time calculating accurate sectors and
> industries in Amibroker.I dont know if its the data or the
> complexity of
> Ami..I will read up on scan and try to understand why the date
> range in
> settings has no impact on the Scan period.
>
>
>
> Is there an AMI rule of thumb as to how far back in time one
> should go when
> using ATC to create sectors and Industries??? I have yet to
> successfullycreate a full sector/industry database with QP data
> that didnt have a
> significant number of spikes or negative volume
>
>
>
> Allan
>
> ----- Original Message -----
> From: Paul Ho
> Date: Friday, September 29, 2006 9:46 pm
> Subject: RE: RE: [amibroker] Scan and Settings
> To: [EMAIL PROTECTED]ps.com
>
> > You can limit the date range only by using AFL statements like
> >
> > Dn = datenum() >= xxxxxxxx
> >
> > Addtocomposite(iif(Dn, realvalue, NULL), ticker,
"field";
> >
> > That should do it.
> >
> > Paul.
> >
> > _____
> >
> > From: [EMAIL PROTECTED]ps.com
> > [mailto:amibroker@yahoogroups.com]
On Behalf
> > Of [EMAIL PROTECTED]net
> > Sent: Saturday, 30 September 2006 8:51 AM
> > To: [EMAIL PROTECTED]ps.com
> > Subject: Re: RE: [amibroker] Scan and Settings
> >
> >
> >
> > Hi Terry,
> >
> > No matter what I do,my composites are set to the full history
> > which is apx
> > 10 years
> >
> >
> >
> > Allan
> >
> > ----- Original Message -----
> > From: Terry
> > Date: Friday, September 29, 2006 6:23 pm
> > Subject: RE: [amibroker] Scan and Settings
> > To: [EMAIL PROTECTED]ps.com
> >
> > > I do this all the time. I set/change the date range,
> expecting
> > > it to
> > > auto-select, but it doesn't. You ALSO have to click the
> button
> > beside> the date range.
> > > --
> > > Terry
> > >
> > > -----Original Message-----
> > > From: [EMAIL PROTECTED]ps.com
> > > [mailto:amibroker@yahoogroups.com]
On
> > > Behalf Of matrix10014
> > > Sent: Friday, September 29, 2006 15:37
> > > To: [EMAIL PROTECTED]ps.com
> > > Subject: [amibroker] Scan and Settings
> > >
> > > Hi,
> > > Whwn i run my ATC's in Scan and have my settings set for 365
> > > days,for
> > > some odd reason the composite i am creating goes back 10
> > > years.What do
> > > i do to limit the composite to 365 days??
> > >
> > > Thanks,
> > >
> > > Allan
> > >
> > >
> > >
> > >
> > >
> > >
> > > 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 other support material please check also:
> > > http://www.amibroker.com/support.html
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> >
> >
>
>
>
>
