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OK. I think you might need the valuewhen() function or a static variable
for that.
----- Original Message -----
From: "sibir61" <sibir61@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Tuesday, September 27, 2005 10:06 AM
Subject: [amibroker] Re: Newbie question
> 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
>> >
>> >
>> >
>> >
>> >
>> >
>
>
>
>
>
>
> 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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