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Herman,
This question is a trap.
How "successful or not" is defined ??
It should be explained *before* the question.
Foreign() function works well as a function, I use it 100 times/day
for a long time. I will suppose you have similar experience.
Almost all my trading money are based on Foreign() function
functionality and, as you understand, I have made many checks.
The foreign("MSFT","C") will give an array identical to MSFT close.
Consequently, the question is automatically transferred to
a "successful or not" MSFT close data.
What is the meaning of "successful or not" MSFT data ??
It should be clearly explained *before* this tricky question.
Without this explanation, the answer is automatic : Foreign
("MSFT","C") is equally successful as MSFT Close.
Dimitris Tsokakis
PS: If "successful" means profitable, let me know and we shall do
something for this...
--- In amibroker@xxxxxxxxxxxxxxx, "Herman vandenBergen" <psytek@xxxx>
wrote:
> Salil, I'd love an answer to this as i am struggling to detect the
existence
> of Composites.
>
> I thought of using IsEmpty(Foreign(...)) but I couldn't get it to
work well,
> another way may be to use Cum(Foreign(...))==0 to indicate there is
no
> data... but there must be a better way.
>
> herman
> -----Original Message-----
> From: Salil V Gangal [mailto:salil_gangal@x...]
> Sent: April 30, 2003 12:00 PM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: [amibroker] How to detect if 'foreign' is successful or
not ?
>
>
> Friends,
>
> If a 'foreign' function is executed, then how to detect
programatically if
> it is successful or not ?
>
> I thought IsNull will be useful, but it was not. I executed the
following
> code (and there is MSFT in the database I'm using) and it
shows 'IsNull is
> true' for both. I tried the code without 'Ref' as well ... Same
result.
>
> security=foreign("MSFT","C");
>
> if ( IsNull(Ref(security,0)) ) {
>
> message = "IsNull is true";
>
> }
>
> else {
>
> message = "IsNull is false";
>
> }
>
> message;
>
>
>
> security=foreign("DoesNotExist","C");
>
> if ( IsNull(Ref(security,0)) ) {
>
> message = "IsNull is true";
>
> }
>
> else {
>
> message = "IsNull is false";
>
> }
>
> message;
>
>
>
> Regards,
>
> - Salil V Gangal
>
>
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