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Berrnard - I've added a bit to your and Johan's
script and I've
run this routine below on many different watchlists,
but it fails(gives zeros)
when the watchlist has empty tickers, i.e. tickers with
empty price arrays.
I traced almost every variable in the little
routine. One enhancement would be
to use the IsEmpty function to process or
count only the valid(filled) price arrays.
IIf(IsEmpty(f), 0, 1);
The way to run this is
Make sure all your tickers have valid arrays in the
watchlist you select.
Using the parameters pick a watchlist number and a
lookback period.
1) Place a long lived array in the window for current
issue - an index, IBM, or other symbol with 3-5K daily bars.
2) under filter select
current symbol
3) under range put as many days as you want to list
under the explore function
4) add to composite will generate a curve for
you
5) Hit scan to generate ATC, or explore to see what
filters out
6) Go to Debug view to see what's working and
what's not.
Hope this helps
JOE
// Set the parameters
listnum = Param("Watch List",
1, 0, 63, 1);
lookback = Param("MA Period",
5, 5, 200, 1);
// Set an array of nulls
nbcount = Close-Close;
Count = Close-Close;
Liste = CategoryGetSymbols( categoryWatchlist,Listnum);
for ( i = 0; ( Sym = StrExtract( Liste, i ) ) != ""; i++ )
{
f = Foreign( Sym,
"C" );
_TRACE ("Ticker " + SYm);
MMA = MA(f,
Lookback); logic = f>mma;
_TRACE ("MAvg "+ MMA+
" Close "+f+" Logic "+logic);
// Need to test here to see if ticker has any data
nbcount = nbcount + IIf(f > MMA,1,0);
Count = Count + 1;
_TRACE ("Count "+Count+" nbcount
"+nbcount);
}
Buy=Sell = 0;
AddToComposite (nbcount,"~NBTest","X");
Filter = 1;
AddColumn (NBCount,"NB");
AddColumn (Count,"Count");
----- Original Message -----
Sent: Sunday, July 03, 2005 9:21 AM
Subject: Re: [amibroker] Re: Help in
AFL
On TRACE, I believe if you put the trace statement
inside the loop, you should get
a trace statement output for each iteration. From that
you can see if your logic is working
as it should, you can detect the issues that meet the
criteria Close>MA(C,20) and also
JOE
----- Original Message -----
Sent: Sunday, July 03, 2005 4:26
AM
Subject: Re: [amibroker] Re: Help in
AFL
Johan
Yes Nb was initialzed before the loop but with
Nb=0.
Yes the wtachlist is populated.
But I still have a problem with
Nb since it is always 0.
Nb is the number of stocks having their Close
higher than MA(20) so it should be an array.
So I have modified my code
with nb=[0]
But it still don'tworks.
How can I check the array Nb
?
I have tried with _TRACE but it only give one value.
Thanks for
your help
Berrnard
johsun a écrit :
Bernard,
Two things,
1. The code will give
an error if you don't initialize nb. I assume
you're doing that
outside the loop so it doesn't get reset to zero
on each
iteration...
2. Is watchlist 0 populated?
This works on my
computer:
nb = 0;
Liste = CategoryGetSymbols(
categoryWatchlist, 0 );
for( i = 0; ( Sym = StrExtract( Liste, i ) ) !=
""; i++ )
{
f = Foreign( Sym, "C" );
MMA = MA(f, 20);
nb = nb
+ (f> MMA);
}
Johan
--- In amibroker@xxxxxxxxxxxxxxx,
Bernard Bourée <bernard@xxxx>
wrote:
> I
want to build an operator calculated as being the number of
stocks in
> a given WatchList having their Close higher than their MA on 20
days
> My code always return nb=0
>
> Liste =
CategoryGetSymbols( categoryWatchlist, 0
);
> for( i = 0; ( Sym = StrExtract( Liste,
i ) ) != ""; i++ )
>
{
> f =
Foreign( Sym, "C"
);
> MMA =
MA(f, 20);
> nb = nb
+ (f> MMA);
> }
>
>
Thanks for your help
>
> --
> Bernard Bourée
>
bernard@xxxx
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To get support from AmiBroker
please send an e-mail directly to
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amibroker.com
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--
Bernard Bourée
bernard@xxxxxxxxxx
Mob: +33 6 09 11 05 91
Please note that this group is for
discussion between users only.
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send an e-mail directly to
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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:
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