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Graham,
FVB / LVB return bar numbers based on QuickAFL
arrays, - i.e. visible bars plus preceding 30.
FVBI / LVBI return bar numbers based on full data
arrays, even without SetBarsRequired.
Steve
----- Original Message -----
Sent: Thursday, August 31, 2006 11:39
PM
Subject: Re: [amibroker] Re: Need Help
With FirstVisibleBarIndex
Thanks Fred. So FirstVisibleBar delivers the barindex() value
as well FirstVisibleBarIndex. I would have thought that they would be
different otherwise why have the both of them
That is gong to require
reworking of all existing AFL that use FirstVisibleBar as a 0 or 1 value
--
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 01/09/06, Fred
<[EMAIL PROTECTED]>
wrote:
Apparently
? Appears to ?
When in doubt use Explore or Plot or _Trace
...
Plot(Status("FirstVisibleBar"), "FVB",
colorWhite);
Plot(Status("FirstVisibleBarIndex"), "FVBI", colorYellow);
Plot(Status("LastVisibleBar"), "FVB",
colorGreen);
Plot(Status("LastVisibleBarIndex"), "FVBI",
colorRed);
--- In [email protected] ,
"wlandry01" <[EMAIL PROTECTED]> wrote:
>
>
Graham,
>
> I've seen conflicting comments on that point so
I
> checked the AFL reference for "Status" online. It shows
the
> following;
>
> "firstvisiblebar", "lastvisiblebar",
"firstvisiblebarindex",
> "lastvisiblebarindex" - return bar number or
bar index of
> first/last visible bar. Available in indicator mode
only.
>
> I used to think "firstvisiblebar" returned a "1", but
it does,
> apparently, return the bar number, as the following
code
> appears to work fine:
>
> HVC =
Highest(ValueWhen(BarIndex() >= Status("FirstVisibleBar")
> AND
BarIndex() <= Status("LastVisibleBar"), Check));
>
> If you
have more recent information, of if I've misinterpreted
> something,
please let me know as I've had some difficulty
> completely
understanding the Status indicators.
>
>
Thanks,
>
>
>
Wayne
>
>
>
>
>
>
>
>
>
>
--- In [email protected],
Graham <kavemanperth@> wrote:
> >
> >
fistrvisiblebar returns a value of 1 on the first bar on screen.
So
you
> > would need to use
>
lastvalue(valuewhen(status("firstvisiblebar"),barindex()))
>
>
> > however I believe there is now
status("firstvisiblebarindex")
which will
> > give you the value
of barindex
> >
> >
> >
> > --
>
> 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 01/09/06, wlandry01 <wlandry01@>
wrote:
> > >
> > > Herman,
> > >
>
> > Many thanks to you and all the others who provided input
on
this.
> > > Sorry for the delay in responding but I
decided to shut the
> > > computer down while waiting for
Ernesto to work his way through
> > > South Florida.
>
> >
> > > In any case, I now have my study
working! I do have a question,
> > > however, on the
code that you listed:
> > >
> > >
Plot(C,"",1,128);
> > >
SetBarsRequired(1000000,1000000);
> > > BlankBarsInRightMargin =
4;
> > >
> > >
Plot(BarIndex()==Status("FirstVisibleBar"),"",5,styleArea|
> > >
styleOwnScale,-10,10);
> > >
> > >
Plot(BarIndex()==Status("LastVisibleBar")-
BlankBarsInRightMargin,"",
> > >
4,styleArea|styleOwnScale,-10,10);
> > >
> > > When
I chart this I get a light green line running from left to
> > >
right on the chart. At the far left there's a small, vertical
> > > green bar and on the far left there is a red
bar. On the far
> > > right of the chart "0.00000" is
shown in both red and green.
> > > I've discovered that I can
"separate" the red and green bars
> > > (and lines) by
adjusting the minimum and maximum setpoints.
> > >
> >
> I don't understand, however, what generates the green line
> >
> between the two bars (or the red line, for that matter).
> >
> The Plot statement seems to call for a plot when BarIndex()
>
> > is equal to a specific value (the endpoints). I reset
the
> > > Plot statement to show
BarIndex()>=Status("FirstVisibleBar")
> > > and the green
bar expands to fill the entire screen, which makes
> > > sense
to me, but I don't see what's generating the line in the
> > >
original code. Does the Plot statement assume a zero value if
> > > the statement returns false?
> > >
>
> > Thanks,
> > >
> > >
> > >
Wayne
> > >
> > >
> > > --- In [email protected],
Herman <psytek@> wrote:
> > > >
> > > >
Fred, my post did not refer to your code; your code is fine
and
does
> > > > what it is supposed to do. I just outlined some
problems one
may
> > > > encounter when working with
First/LastVisibleBar.
> > > >
> > > > The
problems I eluded to have all happened to me at one time
or
>
another
> > > > and resulted in a waste of my time. I use RT
however I assume
the
> > > > problems can occur in EOD
just the same. The problems can
easily be
> > > >
confirmed by right-justifying your chart, running my code,
> > >
> adding/removing the SetBarsRequired() and/or changing the
number
of
> > > > Blank bars in Preferences. You will note that
LastVisibleBar
marker
> > > > appears and disappears
depending on what one might have
assumed
> to be
> > >
> unrelated conditions.
> > > >
> > > >
best regards,
> > > > herman
> > > >
>
> > > Fred wrote:
> > > > > Herman,
> >
> > >
> > > > > While I'd admit that the
statement I posted really should
take the
> > > > >
LastValue i.e.
> > > > >
> > > > > HVC =
LastValue(Highest(ValueWhen(BarIndex() >= Status
> > > >
> ("FirstVisibleBar") AND BarIndex() <=
>
Status("LastVisibleBar"), C)));
> > > > >
> >
> > > I don't follow the rest of your post ... With or
without
bars
> in the
> > > > > right margin I
seem to get the correct result when HVC is
> plotted ...
> >
> > >
> > > > > Under what conditions do you not
get the correct result ...
> > > > >
> > >
> >
> > > > >
> > > > >
>
> > > >
> > > > >
> > > > >
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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>
>
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