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I use something that I learnt (in the old days with MS) called a
latch that
can be useful. I tend to avoid loops if there is another way;
// Entry & Exit criteria
entry = Entryconditions...;
exit = ExitConditions...;
// Roy Larsen's latch
I = Cum(entry + exit > -1)==1;
tr = BarsSince( I OR entry) < BarsSince(I OR exit);
// Target set when buy triggered
targetloss = ValueWhen( Cross(tr, 0.5), Loss, 1);
targetProfit = ValueWhen( Cross( tr, 0.5), profit, 1);
Buy = entry AND Ref(tr, -1) == 0;
Sell = exit OR ((C > targetprofit OR C < targetloss) AND Ref(tr, -1))
;
In the above code there are a few variables that need to be specified
(ie
Loss, Profit etc) but it does work to set these targets without
loops. My
translation from MS is probably a bit rough but it does the job for
me.
Steve
--- In amibroker@xxxxxxxxxxxxxxx, "Charles Stangor"
<cstangor232@xxxx>
wrote:
> Graham.
>
> I think your last comment about loops makes some sense to me and is
in
fact
> exactly the issue I have been working on. Sometimes you need
variable x
to
> define variable y, but you can't define x until you define y !!
>
> For instance:
>
> Buy = Buycond and NumberofPriorBuys < 3;
> NumberofPriorBuys = sum(buy, barssince(daystart));
>
> But how can I use a loop to solve this mess?
>
> Thanks in advance...
> ----- Original Message -----
> From: "Graham" <kavemanperth@xxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Thursday, September 29, 2005 7:23 PM
> Subject: Re: [amibroker] Bitten the bullet on loops
>
>
> > Loops are best used when you need to refer to a previous value of
a
> > variable in calculating the current value of that same variable.
> > There are other cases where loops are preferable, but I first try
> > "normal" AFL functions and methods first. If at first they don't
> > succeed get loopy
> >
> > --
> > 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 9/30/05, Charles Stangor <cstangor232@xxxx> wrote:
> >> Are you guys writing loops because you just can't do what you
want
using
> >> the
> >> regular ++ code? I'm getting convinced it's the way to go.
Thanks
for
> >> the
> >> great code.
> >
> >
> >
> > 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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