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RE: [amibroker] AFL - Array subscript



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FWIW, I second this FR.

I'd even go one step further and request (although much lower 
priority) that you provide a way to identify that it was AB which the 
padded data, through some means (variable) other than V==0 condition. 

TIA,

Jitu

--- In amibroker@xxxxxxxxxxxxxxx, "Andrew Perrin" <adjp@xxxx> wrote:
> Please, Please  add this option.   We can then use padding to keep 
our
> system timers correct, and correctly screen our stocks for 
liquidity.  This
> type of padding (Vol = 0) is perhaps more typical of what data 
providers
> supply.
> 
> My own backtests (using AB Padding), have caused some unusual 
results eg. A
> small mining stock that suspended trading for 6 mths.  Last trading 
day had
> a >25 % runup in price.  One of my backtests had daily Buy then 
profit stop
> Sell for 6 mths.  Fantastic returns but totally misleading  (and 
yes easy to
> spot and prevent, but that is not the point ).  With Vol = 0 
padding, this
> stock would not have made it through my liquidity filters.
> 
> Please add this option,  It will be greatly appreciated
> 
> Andrew
> ----- Original Message -----
> From: "Tomasz Janeczko" <amibroker@xxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Friday, January 02, 2004 8:48 AM
> Subject: Re: [amibroker] More on data holes - for TJ
> 
> 
> > Hello,
> >
> > Currently it is padded too, but I may add option to fill with 
zero.
> >
> > Best regards,
> > Tomasz Janeczko
> > amibroker.com
> > ----- Original Message -----
> > From: "Michael.S.G." <OzFalcon@xxxx>
> > To: <amibroker@xxxxxxxxxxxxxxx>
> > Sent: Thursday, January 01, 2004 11:20 PM
> > Subject: Re: [amibroker] More on data holes - for TJ
> >
> >
> > > Hi TJ,
> > >
> > > When AB pad's data with pad & align check box, Is Volume Padded 
(Last
> bars
> > > volume) or is the volume set to 0 for the padded bars?
> > >
> > > KR
> > >          Michael.
> > >
> > >
> > > At 08:04 AM 2/01/2004, you wrote:
> > > >Hello,
> > > >
> > > >Yes I understand that you can create data holes consistently 
from CSI
> data.
> > > >On the other hand, one can PAD AUTOMATICALLY data in AmiBroker
> > > >for backtesting by marking single check box "Pad and align 
data to
> > > >reference symbol"
> > > >in Automatic Analysis -> Settings -> Portfolio tab.
> > > > From that point of view it is easier for me to PAD (on-demand 
and
> > > > on-the-fly, when needed)
> > > >data in AmiBroker than to be forced to use particular data 
vendor.
> > > >That's why I think using unpadded data in AmiBroker has 
advantage: I
> can
> > > >pad them whenever I want and
> > > >it is as easy as marking single checkbox in AmiBroker, and can 
use
> > > >unpadded data without
> > > >writing any special software. I am also not "hard-wired" to 
any data
> > > >vendor that way.
> > > >
> > > >Best regards,
> > > >Tomasz Janeczko
> > > >amibroker.com
> > > >----- Original Message -----
> > > >From: <mailto:chuck_rademacher@x...>Chuck Rademacher
> > > >To: <mailto:amibroker@xxxxxxxxxxxxxxx>amibroker@xxxxxxxxxxxxxxx
> > > >Sent: Wednesday, December 31, 2003 9:29 PM
> > > >Subject: [amibroker] More on data holes - for TJ
> > > >
> > > >TJ,
> > > >
> > > >Paul's plug-in and my conversion program could, if desired, 
create data
> > > >holes (consistently) for users who want them.   I'm not trying 
to be
> > > >funny, but it is possible to leave a hole on those days when 
the volume
> is
> > > >zero.   We can forget about why anyone would want to do 
this.   It can
> be
> > > >done and it would be 100% consistent rather than 15% 
consistent like it
> is
> > > >for most data providors.
> > > >
> > > >My question for you, however, is how do the various indicators 
and
> moving
> > > >average calculations deal with un-padded data holes.   If I do 
a 5-day
> MA,
> > > >for instance, and one of the days has no data, what would I 
get for the
> > > >MA?   Same for RSI or any other indicator.    It's taken me 
years to
> get
> > > >rid of data holes and find a data providor who will 
consistently pad
> them
> > > >for me so that indicators and other calculations work properly 
(IMO).
> > > >
> > > >I could test to see how some of these calculations are 
affected... if
> only
> > > >I had some data holes!!
> > > >
> > > >
> > > >
> > > >
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