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Investing a good data source is a prerequisite for trading. The
monthly cost can be equated to about a round turn commission. Yet if
the information is faulty, it can cost much more when you
trade...Something that needs to be considered.
--- In amibroker@xxxxxxxxxxxxxxx, "wecus" <member@xxxx> wrote:
> Rick,
>
> not only that, I just discovered that historical prices sometimes
> diverge from
> reality. Take a favourit of mine -SINA- on July 17th:
>
> Jul-17-03 25.84 26.53 23.00 24.50 10,360,700 24.50
> http://table.finance.yahoo.com/k?s=sina&g=d
>
> On the NASDAQ home you find this
>
> 07/17/2003 25.840 26.530 24.150 24.500 10,357,240
> http://quotes.nasdaq.com/quote.dll?
>
page=charting&mode=basics&intraday=off&timeframe=5d&charttype=ohlc&spl
>
its=off&movingaverage=none&lowerstudy=volume&comparison=off&index=&dri
> lldown=off&symbol=SINA&selected=SINA
>
> Since I had ordered a stoploss at 23.42 this mattered to me quite
> some, especially since SINA rebounded the next day to 29$ <g>
> Also the charts in AB will show wrong data if you use Yahoo as a
> source.
>
> I have emailed Yahoo and hope they will provide some answers...
>
> Regards
> Andreas
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Rik Rasmussen" <hrasmussen@xxxx>
> wrote:
> > I know some of you are using Yahoo data.
> >
> > In the Stock Analyzer we also use Yahoo data.
> >
> > I have just discovered a problem in Yahoo data.
> >
> > Example is QQQ. If you check the historical data for QQQ on Yahoo
> it should
> > be complete through Jul18th.
> >
> > Sometimes it is. But If I check it a minute later it might stop
> with JUL 16
> > data.
> >
> > Repeated checks get randomly alternating returns of those two
> situations.
> >
> > Also happens on NDX, and I am guessing could be happening on any
> call for
> > Yahoo historical data.
> >
> > I noticed this when another Stock Analyzer user reported a signal
I
> was not
> > seeing on my chart.
> >
> > At this time I would be careful if using Yahoo data.
> > Rik Rasmussen
> > Stock Analyzer mailing list moderator
> > http://groups.yahoo.com/group/stockanalyzer/
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