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Just found this thread and wanted to ask if you need to modify the
adq.format file too. If you don't, then as soon as u update the
indices, the volume charts will be out of whack.
On the other hand, if u put the $VOLFACTOR 0.001 in the aqd.format
file, that will reduce all stock volumes by 1000.
What a dilemna !!!!
Thanks all for feedback.
--- In amibroker@xxxxxxxxxxxxxxx, "Terry" <MagicTH@xxx> wrote:
>
> But this would give wrong answers for volume (it'd be 2 billion
low).
> See Tomasz answer.
>
>
>
> Hello,
>
>
>
> Just add
>
> $VOLFACTOR 0.001
>
> to your aqh.format file (inside Formats subdirectory)
>
> and you will get volume expressed in thousands of shares
>
> (or use $VOLFACTOR 0.01 for hundreds of shares) once you re-
download the
> history.
>
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
>
>
>
> --
>
> Terry
>
> -----Original Message-----
> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]
On
> Behalf Of Chris Graham
> Sent: Monday, April 24, 2006 12:34
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: RE: [amibroker] Negative volume on downloaded data from
Yahoo
>
>
>
> I use ABS( ) to convert the negative number into a positive one:
>
>
>
> MyVol = ABS(V);
>
> Plot(MyVol,"Volume"...
>
>
>
>
>
> regards
>
> Chris
>
> _____
>
> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]
On
> Behalf Of Terry
> Sent: Tuesday, 25 April 2006 2:08 AM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: RE: [amibroker] Negative volume on downloaded data from
Yahoo
>
>
>
> This has been discussed several times before. Back adjusted data
changes
> the volumes so the adjusted price * adjusted volume still gives
correct
> answers. Volumes can get so large they exceed 32 bit resolution and
> "roll-over" to a negative value. You can change how volume is
handled to
> get Volume/1000 or whatever to avoid this.
>
> Unfortunately, I do not remember the variable to adjust.
>
> --
> Terry
> -----Original Message-----
> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]
On
> Behalf Of yokehg
> Sent: Sunday, April 23, 2006 07:16
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: [amibroker] Negative volume on downloaded data from Yahoo
>
> I just notice that the negative volume on downloaded historical
data
> from Yahoo! is due to overflow data in Amibroker. (It's not Yahoo!
> mistake which I've been thought so far. I'm sorry Yahoo! :-) )
>
> So I convert the negative volume data, simply by using this
formula to
> my favourit volume indicator:
> 2*2147483647+V
> and it works as I expect.
>
> However, lately on new version of Amibroker (or Amiquote?), it
looks
> like that it has been 'fixed' (I'm not sure which version it has
been
> started), so that the volume that is greater than 2147483647 is
> interpreted as 2147483647, which I don't think it is not a good
idea.
>
> Hope Amibroker will rectify this on next version.
>
>
>
>
>
>
>
> 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
>
>
>
> * Visit your group "amibroker
> <http://groups.yahoo.com/group/amibroker> " on the web.
>
>
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>
>
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>
>
>
> _____
>
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