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[amibroker] Re: intraday data missing bars



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thx!

--- In amibroker@xxxxxxxxxxxxxxx, Graham <kavemanperth@xxxx> wrote:
>
> The data is only what the data supplier forwards which is only what
> the exchange dishes out. QT is only the platform to get the data, 
the
> actual data I get from my brokers via QT.
> I only have live my watchlist basket of stocks that am currently
> trading otherwise the gathering of data would take a long time and 
be
> very high in bandwidth. At end of each day I backfill all the stocks
> worth while for the exchange (liquidity measures) This then 
overwrites
> the data gathered during the day ensuring I ahve no gaps in case
> something was missed. eg if your internet connection went down or 
even
> just a connection glitch or the data supply went off line. This 
often
> happens.
> 
> Cannot answer if QT method is better or worse thanh any other. I 
would
> like streaming data but am not prepared to pay for it and do not 
trade
> enough to warrant it
> 
> --
> Cheers
> Graham
> AB-Write >< Professional AFL Writing Service
> Yes, I write AFL code to your requirements
> http://e-wire.net.au/~eb_kavan/ab_write.htm
> 
> 
> On 12/1/05, jnz88 <jnz88@xxxx> wrote:
> > At first, thanks,
> >
> > furtherly,
> > 1. how to scan to make sure AB import data is correct? in other 
word,
> > do you compare the different datasources AB imported? If so, that 
is a
> > pretty heavy task for each day. And if it do find out sth missed, 
how
> > to repair it? must not be manually
> >
> > 2. do you think QT's semi realtime intraday data is as good as 
other
> > intraday data after market close such as from quote.com?
> >
> >
> >
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, Graham <kavemanperth@xxxx> 
wrote:
> > >
> > > AB only stores data that is there. If there were no trades for 
those
> > > times then there will not be any data stored.
> > > AB shows what data there is on the screen, so if no data then 
no bars.
> > >
> > > If on the other hand you knew tha there were trades at those 
times
> > > then it means that AB did not import the data. I run a scan 
over all
> > > the stocks to make sure that AB imports the data. I also turned 
off
> > > theoptimised retrieval of data in the databse settings as this 
limited
> > > data im porting to the most recent in QT and not all of the 
days data.
> > >
> > > --
> > > Cheers
> > > Graham
> > > AB-Write >< Professional AFL Writing Service
> > > Yes, I write AFL code to your requirements
> > > http://e-wire.net.au/~eb_kavan/ab_write.htm
> > >
> > >
> > >
> > > On 12/1/05, jnz88 <jnz88@xxxx> wrote:
> > > > I use QuoteTracker plugin to import intraday data and notice 
that, for
> > > > some stocks, especially the ones are not actively traded, 
there are
> > > > often missing several bars in between.
> > > > For example,(just an example)
> > > > FFIV    11/29/2005 9:48:00 AM   52.15   52.19   52.19   
52.1    2100
> > > > FFIV    11/29/2005 9:47:00 AM   52.18   52.11   52.3    
52.11   10574
> > > > FFIV    11/29/2005 9:45:00 AM   52.19   52.13   52.22   
52.01   8892
> > > > FFIV    11/29/2005 9:44:00 AM   52.17   52.18   52.23   
52.14   3499
> > > > FFIV    11/29/2005 9:42:00 AM   52.22   52.2    52.25   
52.12   10782
> > > > FFIV    11/29/2005 9:41:00 AM   52.23   52.19   52.23   
52.18   4003
> > > > FFIV    11/29/2005 9:38:00 AM   52.19   52.23   52.23   
52.19   1100
> > > > FFIV    11/29/2005 9:37:00 AM   52.23   52.25   52.25   
52.11   7200
> > > > FFIV    11/29/2005 9:36:00 AM   52.25   52.35   52.37   
52.1801 4519
> > > >
> > > > There is no data for the periods 9:43:00 AM, 9:39:00 AM and
> > 9:40:00 AM.
> > > >
> > > > My questions are:
> > > > 1. Do you think the row for 9:41:00 AM cover all the missing 
period
> > > > from 9:39:00 AM to 9:41:00 AM?
> > > >
> > > > 2. Is amibroker able to handle the situation like this where 
there is
> > > > missing bars? in other word, do I need to repair the data 
with the
> > > > missing bars?
> > > >
> > > > thanks,
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > 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
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
> >
> >
> >
> >
> >
> >
> > 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
> >
> >
> >
> >
> >
> >
> >
>






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