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If nothing else it's SLOW ... VERY SLOW ... read BETWEEN ONE AND TWO
ORDERS of MAGNITUDE SLOWER ...
--- In amibroker@xxxxxxxxxxxxxxx, "Steve Dugas" <sjdugas@xxxx> wrote:
>
> Hi All,
>
> Just curious if anyone feels chatty....
>
> I come from MetaStock so I am pretty well acquainted with *its*
shortcomings, and I have learned about some of WealthLab's
shortcomings by reading the e-mails of other people. What are the
shortcomings of TradeStation that make experienced users want to
abandon it for something else? Thanks very much!
>
> Steve
> ----- Original Message -----
> From: Tomasz Janeczko
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Tuesday, January 31, 2006 9:40 AM
> Subject: Re: [amibroker] Re: Initializing Variables once at the
start of the program
>
>
> Hello,
>
> Abandon this way of thinking. You should forget how TS works and
start thinking array-wise.
> http://www.amibroker.com/guide/h_understandafl.html
>
> It is possible to "maintain" value using static variables but it
is simpy wrong way of approaching
> the coding in AB (like using hammer to kill a fly).
>
> Once you forget TS and start thinking array-wise you will soon
discover advantages of it
> including simplicity of code and MUCH faster execution and new
possibilities NEVER possible in TS
> (like portfolio backtesting which would be extremely memory and
time inefficient if implemented in TS-execution way).
> <http://babelfish.av.com/babelfish/trurl_pagecontent?
lp=fr_en&url=http%3A%2F%2Fwww.addictfx.biz%2Farticle-622220-6.html>
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: Mark Fishburn
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Tuesday, January 31, 2006 3:04 PM
> Subject: Re: [amibroker] Re: Initializing Variables once at
the start of the program
>
>
> Hi Fred, thanks for this... that is helpful.
>
> WHat happens when I am intraday trading. I think this will be
processed every TICK. Is that correct ?
>
> I want to process my historical bars ONCE, then only process
the bars I haven't processed - the real time bars. SO, when I apply
my indicator, it will start from bar 0, go to current bar, and then
ONLY process new bars and new real time ticks from there - like
Tradestation does.
>
> I can't seem to set a variable that maintains it's value - I
can't initialize it to FALSE on the first bar, and then have it
increment as I process bars. Is there a way to do that ?
>
> Thanks
>
> -----amibroker@xxxxxxxxxxxxxxx wrote: -----
>
>
> To: amibroker@xxxxxxxxxxxxxxx
> From: "Fred" <ftonetti@xxxx>
> Sent by: amibroker@xxxxxxxxxxxxxxx
> Date: 01/30/2006 11:49PM
> Subject: [amibroker] Re: Initializing Variables once at the
start of the program
>
> TradeStation easy language is processed from to top to
bottom a bar
> at a time ...
>
> AmiBroker AFL is processed from top to bottom with each
statement
> being executed ONCE and ONLY ONCE ... NOT ONCE PER BAR ...
>
> Unless you build your own Do / While / For Loops and
subscript the
> ARRAYS then typically each statement works on the entire
ARRAY ...
>
> For example ...
>
> If I write the AFL
>
> BS = Ref(H, -1) * 1.001;
> SS = Ref(L, -1) * 0.999;
>
> Buy = C > BS;
> Sell = C < SS;
>
> Then each of the above statements will be evaulated once ...
not once
> per bar ...
>
> The first statement will cause an array to be built with
each value
> along the array being 1.001 * The previous bars high. Once
this
> statement is executed or evaluated once it will never be
executed or
> evaluated again.
>
> The second statement will cause an array to be built with
each value
> along the array being 0.999 * The previous bars low.
>
> The third and fourth statement evaluate whether buys and
sells take
> place over the entire history of data that is being looked
at ...
> again by being evaluated ONCE ... NOT ONCE PER BAR ...
>
> I came from TS as well ... years and years of it ... it is
at first
> difficult to visualize the concept of array arithmetic but
in time
> you'll get used to it ...
>
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "clarusinnovation"
<mfishburn@xxxx>
> wrote:
> >
> > Hi,
> >
> > I want to initialize a variable CurrentBar at the start of
my
> program
> > once to 0 - meaning I haven't processed this bar yet. (and
a lot of
> > other variables I want too)
> >
> > I don't know how or where to put the variables so they
won't get
> > initialized every time through the program. I want to keep
their
> > values as I climb up through the bars.
> >
> > each bar that counts up, I want to increment this counter.
> >
> > I tried StaticVariables, but they don't seem to work. How
do I
> > initialize them ONCE and then increment them from there ?
> >
> > Please don't tell me to read the manual, I have been up
and down
> it,
> > reading Understanding AFL, it is taking me days to do the
simplest
> > things...... and it isn't working for me. I came from
Tradestation
> > and I could understand bar flow, with Ami I don't.
> >
> > Please just tell me what to do, and where to put the code.
> >
> > I tried initalizing the variable in a #Include_ONCE file,
that
> didn't
> > work.
> >
> > Thanks a lot, it is very frustrating.
> >
> > Mark
> >
>
>
>
>
>
>
>
>
>
>
> 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
>
>
>
>
>
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