|
PureBytes Links
Trading Reference Links
|
Correct, it remains the same because you reassign it on every bar.
But you if you have test = 999 + bar.minute() - look what that does.
Now assume that my buy stop can only be calculated once and never
again - change bar.minute() to function that generates one value at
10AM and is never called again - now test variable would be in
trouble.
--- In amibroker@xxxxxxxxxxxxxxx, "Charles Stangor"
<cstangor232@xxxx> wrote:
> Not so. Try this simple code:
> test = 999; printf (WriteVal(test));
>
> Test remains at 999 forever unless you change it.
>
>
>
> ----- Original Message -----
> From: "sibir61" <sibir61@xxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Tuesday, September 27, 2005 9:40 AM
> Subject: [amibroker] Re: Newbie question
>
>
> > Hi Graham,
> >
> > I will try to rephrase/simplify my question. Say you have event A
> > taking place at random time T1 and event B taking place at random
> > time T2. There is no technical indicator to connect the two -
both
> > are just formations (could happen at any time). I place a fixed
buy
> > stop once A AND B = TRUE for the rest of the day. That buy stop
does
> > not get activated till sometime later in the day if ever, again
> > formations. AFL evaluates code you write every time for each new
bar,
> > which means that there is no way of passing fixed info from one
bar
> > to another, because on every bar every member of the array has to
be
> > reassigned again - x=ref(x,-1) does not work because compiler
> > complains about x not being initialized (correct).
> >
> > To summarize my question: if i evaluate stocks on a 1 min bar how
do
> > I store a value I calculate at 10AM on a 1 min bar to keep that
value
> > persistent for the rest of the trading day. AFL resets all
variables
> > on each bar, which prevents me from storing any values.
> >
> > int x = 0;
> > foreach(Bar bar in minuteBars){
> > if(bar.Time()=="10AM")
> > x = bar.High()+magicNumber;
> > if(bar.High()>x && x!=0)
> > Buy = 1;
> > }
> > AFL from my understanding has a limited number of nested scopes.
> > It seems that in AFL there is no way to define x the way it is
done
> > in here because AFL assumes that you can only write code within
that
> > foreach loop - AFL evaluater acts as a loop, which if true is
really
> > really bad.
> >
> > Are there any workarounds?
> >
> > Thanks.
> >
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, Graham <kavemanperth@xxxx>
wrote:
> >> Steve
> >> For a starter at AFL seems like you want to jump in te deep end.
I
> >> would suggest you start with one item at a time rather than try
to
> >> code everything at first attempt
> >>
> >> to define the value of a variable just use
> >> VariableName = 10;
> >> The value will not change throughout the entire AFL, unless you
give
> >> it a different value later on within the AFL
> >> You may only need to use the function function if you really
need to
> >> define a new custom function for multiple uses with different
inputs
> >>
> >> To use an array value at a certain time (or when any other
specific
> >> occurence is true) use the function Valuewhen
> >>
> >> Other than that am confused on what your problems are.
> >>
> >> --
> >> 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 9/24/05, sibir61 <sibir61@xxxx> wrote:
> >> > Hi there,
> >> >
> >> > I am a newbie with a system, so I have a couple of questions
about
> >> > coding up price formation based trading system. I need to set
up
> > global
> >> > variables that are global not for a current bar, but for a
whole
> > system
> >> > and/or for a certain time period: I would like to calculate
buy
> > stop
> >> > price at 10AM everyday once and use that number for the rest
of
> > the
> >> > day. I was not able to find any meaningful way to do so - the
> > UserGuide
> >> > refers to global variables vs local variables within
functions -
> > still
> >> > for 1 bar, regardless of the timeframe. I, however, need global
> >> > variables defined within the entire execution cycle. How do I
do
> > that?
> >> >
> >> > More detailed example: I prefilter stocks based on previous
day's
> > ATR
> >> > action. If it satisfies my condition then I sit tight the next
> > day till
> >> > 10AM when I determine today's price target based on H/L
values.
> > Then I
> >> > combine the two conditions/prices to determine the entry buy
> > stop. This
> >> > is done just once for a day - not on every bar. Profit target
is
> > also
> >> > just an entry price + certain range = fixed target during the
> > day. I am
> >> > having difficulty convincing Amibroker to store those values
and
> > not
> >> > recalculate them on every bar. I trade on a 1 min bar time
range.
> >> >
> >> > Steve
> >> >
> >
> >
> >
> >
> >
> > 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
> >
> >
> >
> >
> >
> >
------------------------ Yahoo! Groups Sponsor --------------------~-->
Put more honey in your pocket. (money matters made easy).
http://us.click.yahoo.com/r7D80C/dlQLAA/cosFAA/GHeqlB/TM
--------------------------------------------------------------------~->
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
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/amibroker/
<*> To unsubscribe from this group, send an email to:
amibroker-unsubscribe@xxxxxxxxxxxxxxx
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|