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I've been with QP EOD for many years now and after looking at several
other data suppliers, I would not change.
The data integrity is very good. The AB interface is fast.
There is a caveat that everybody should be aware of however:
Back at the top of the dot com bubble, QP had over 10K common stocks
in the database. Now there are just over 5500 common stocks in the
database. So as companies come and go, QP drops them from the database.
Why is this an issue you might ask...
Removing dead issues from the database results in a psuedo "looking
forward" aspect to your backtesting results. In other words, if failed
companies are removed from your database by the nice folks at QP, then
you are being deprived of seeing how your backtested systems would
have been affected using the data from those failed stocks.
Several years ago, someone claimed that CSI retained the data for
these dead companies in their database, but over the years I've looked
at CSI and have been disappointed at their charges while not being
convinced about the exact nature of the data they supply.
--- In amibroker@xxxxxxxxxxxxxxx, "Howard B" <howardbandy@xxx> wrote:
>
> Greetings all --
>
> Let me add my voice to those suggesting that you reconsider leaving
Quotes
> Plus.
>
> I am a subscriber to QP for both EOD and RealTime.
>
> I have had difficulties with QP's billing department. Gary got them
> straightened out for me.
>
> I am satisfied with the quality of the data.
>
> Consistency is worth a lot. Most of my research and most of my
trading is
> done based on systems that I have developed using QP data. If I were to
> change to another vendor, I would begin to notice differences. That
would
> concern me, and I would spend way too much time deciding whether I
needed to
> be worried or not. In the end, my choices would be to redo a great
deal of
> research, or go back to QP to resolve the differences.
>
> Thanks,
> Howard
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