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Hello,
Exactly. In AmiBroker it is up to YOU which way is best for your particular use.
You can mix those two approaches in any way you want / need.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "Zeno" <lars.oppermann@xxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Tuesday, January 11, 2005 12:11 AM
Subject: [amibroker] Re: equivalent of PREV
>
>
> Tomasz,
>
> Thanks for your answer. Loops are clearly much more powerfull then MS
> PREV.
> I think I am still confusing concepts of the different systems I am
> looking at at the moment. TradeSignal is all LoopBased (and painfully
> slow at that) - the loop is implicit, as the script just gets
> evaluated for each bar. MS then is all array or function based. Which
> just leaves you with PREV.
>
> I now begin to see that AB is kind of offering best of both worlds
> here and gives me the option to choose the most apropriate method myself.
>
> Bests,
> ~Lars
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <amibroker@xxxx>
> wrote:
>> Hello,
>>
>> As I wrote in the past MS PREV is the worst thing they came up with.
>> Among other things it is painfully slow (try formula with and
> without PREV
>> in MS and you will understand what I am talking about - it makes things
>> hunderds times slower).
>> They invented PREV because MS is incapable of looping.
>>
>> AmiBroker does not need such pseudo-solutions because you can
>> write loops in AFL and easily reference previous values:
>>
>> HaOpen = HaClose = (O+H+L+C)/4;
>>
>> for( i = 1; i< BarCount; i++ )
>> {
>> HaOpen[ i ] = (HaOpen[ i - 1 ] + HaClose[ i - 1 ]) /2;
>> }
>>
>> Looping has no speed penalty of PREV and it is much more powerful and
>> syntactically clearer.
>>
>> As for AMA it is actually very easy and powerful way to implement
>> any kind of dynamic recursive 1-st order smoothing and there is
> nothing odd about it.
>> (ask any engineer about 1-st order infinite impulse response filters)
>>
>> Best regards,
>> Tomasz Janeczko
>> amibroker.com
>> ----- Original Message -----
>> From: "Zeno" <lars.oppermann@xxxx>
>> To: <amibroker@xxxxxxxxxxxxxxx>
>> Sent: Monday, January 10, 2005 11:39 PM
>> Subject: [amibroker] Re: equivalent of PREV
>>
>>
>> >
>> >
>> > Hermann, Steve,
>> >
>> > Thanks so much for your fast reply. My understanding is, that this is
>> > 'exploiting' the fact, that AMA is also dependant on a feedback of
>> > it's own result.
>> > This is a nice trick, but it strikes my as being somewhat odd :)
>> > Shouldn't there be a more elegant way of doing those things in AFL
>> > (feature request?)
>> >
>> > Thanks again
>> > ~Lars
>> >
>> >
>> >
>> >
>> >
>> >
>> > Check AmiBroker web page at:
>> > http://www.amibroker.com/
>> >
>> > Check group FAQ at:
> http://groups.yahoo.com/group/amibroker/files/groupfaq.html
>> > Yahoo! Groups Links
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>
>
>
>
>
>
> Check AmiBroker web page at:
> http://www.amibroker.com/
>
> Check group FAQ at: http://groups.yahoo.com/group/amibroker/files/groupfaq.html
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
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