Re: [amibroker] Re: Backfilling problem, AmiBroker Email List Archive

2008/5/1, onelkm <LKMCD1@xxxxxxx>:

Louis
That sounds like what I have encountered also. I believe it is a
result of selecting "enable" to save the database as local in the
database settings, but I have not disabled this feature to check it
out. Not sure if it is something AB or IQ controls.
Larry

--- In amibroker@xxxxxxxxxxxxxxx, "Louis Préfontaine"
<rockprog80@xxx> wrote:
>
> Hi,
>
> The problem happens when I don't backfill for some days. If I scan
everyday
> with a force backfill I don't see a lot of problem, but if I forget
to do it
> for some days then the backfill is partial (e.g. only for some
days, and
> there will be a hole of days/weeks between two bars one next to the
other).
> The big problem is that I used spx.xo as a reference symbol and
there was
> such hole in the data (one bar was March 26 or 27 and the next one
April 14)
> so each stock had the same problem. So right now my database is
corrupted,
> and I don't know what to do except to restart a new databse and
take about 5
> hours to set everything. Maybe there is a simplier way to do the
job?
>
> I wonder if this is a IQFeed problem or an AB problem. If it is a
IQFeed
> problem, well I will change data provider cause it is a big problem!
>
> Louis
>
> 2008/4/29, onelkm <LKMCD1@xxx>:
> >
> >
> > Louis
> > I am also using IQ feed and have sometimes noticed issues
> > backfilling. It seems to work ok for me when the market is open,
> > backfills are less reliable when market is closed which requires
> > forced backfills. Is your problem happening primarily when the
market
> > is closed? are you using intraday data or end of day?
> > Larry
> >
> > --- In amibroker@xxxxxxxxxxxxxxx <amibroker%
40yahoogroups.com>, "Louis

> > Préfontaine"
> > <rockprog80@> wrote:
> > >
> > > Hi,
> > >
> > > I have a big problem backfilling my quotes. I am with IQ Feed,
and
> > when I
> > > try to backfill the quotes using a random formula with "Waiting
for
> > > backfill" option ticked, there are three things that can happen:
> > >
> > > 1) The backfill is ok (maybe 20%);
> > > 2) I get only the last 5-6 days and there is a gap before that;
> > e.g. one bar
> > > is April 04 and the next bar is April 20. Very problematic.
> > (maybe 60%);
> > > 3) The last 5-6 days are all phony quotes; e.g. the 5 days are
> > identical
> > > quotes with exact OHLC (maybe 20%).
> > >
> > > This is a big problem for me. Anybody has/had the same problem
or
> > know how
> > > I can deal with this? (My guess is that running the formula each
> > night
> > > could help for point 2, but I am not sure for point 3.)
> > >
> > > Thanks,
> > >
> > > Louis
> > >
> >
> >
> >
>