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William,
thanks for the help on _TRACE function (already known).
I was already dreaming on an utility/dll/something useful to simplify
the debugging process. I'm not saying that _TRACE isn't useful, but
I'm too lazy, badly accustomed by today's developing IDE ;)
Regards,
romadd64
--- In amibroker@xxxxxxxxxxxxxxx, "William Peters"
<williampeters@xxxx> wrote:
> This was introduced in version 4.32.0
>
> a.. experimental feature, NOT for beginners, may be
removed/modified in
> future releases:
> new _TRACE( "string" ) AFL function added
> that allows to write debug messages from AFL code to system debug
viewer.
> (it calls internally OutputDebugString Win API function).
> To view debug messages you have to run DebugView freeware program
> from http://www.sysinternals.com/
>
>
>
>
> Regards,
> William Peters
> www.amitools.com
>
>
>
> -----Original Message-----
> From: Email [mailto:romadd64@x...]
> Sent: August 16, 2003 3:32 PM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: [amibroker] Re: MIN function not working
>
>
> Phsst,
>
> Using the no-procedural style of AFL, you can write :
>
> CoverPrice = LLV(Ref(H,-1),BarsSince(Short));
>
>
> One question : what is SPY ? It's useful for debugging AFL ?
(Tomasz,
> please note for wish list : DEBUGGER !!! ;) )
>
>
> romadd64
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Phsst" <phsst@xxxx> wrote:
> > Chuck,
> >
> > That might be the problem. I'll check it out.
> >
> > Phsst
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Chuck Rademacher"
> > <chuck_rademacher@x> wrote:
> > > Phsst...
> > >
> > > Aren't you completely overwritting CoverPrice when you say:
> > >
> > > CoverPrice = x;
> > >
> > > -----Original Message-----
> > > From: Phsst [mailto:phsst@x...]
> > > Sent: Thursday, August 07, 2003 2:19 PM
> > > To: amibroker@xxxxxxxxxxxxxxx
> > > Subject: [amibroker] MIN function not working
> > >
> > >
> > > In a SHORT backtest I want to make my own assignments to the
> > > CoverPrice array... then use the CoverPrice as the 'trailing
> buy stop'
> > > price that I use to stop out a position.
> > >
> > > I NEVER want the CoverPrice to INCREASE.
> > >
> > > I ALWAYS want the CoverPrice to either REMAIN UNCHANGED OR
> DECREASE
> > > with each new bar.
> > >
> > > I've tried many gyrations of AFL code to accomplish this and
> have
> > > spent more hours on it than I care to admit to, but I have
> narrowed my
> > > problem down to the failure of the MIN function to return the
> lowest
> > > value.
> > >
> > > Here is an extremely simple exploration to demonstrate the
> problem:
> > > ------------------------------------------
> > >
> > > // Explore and Debug Trailing Stop logic
> > >
> > > for( i = 1; i < BarCount; i++ ) // Pad CoverPrice array with
> HIGH
> > VALUES
> > > {
> > > CoverPrice[i] = 99999;
> > > }
> > >
> > > // I verified that entire CoverPrice array now padded with
> 99999's
> > >
> > > x = Min( Ref(H,-1) , Ref(CoverPrice, -1) );
> > > CoverPrice = x;
> > >
> > > Filter = 1;
> > >
> > > AddColumn(x,"x = Min(Ref(H,-1),Ref(CoverPrice, -1))",6.3);
> > > AddColumn(Ref(H, -1),"Ref(H, -1)",6.3);
> > > AddColumn(Ref(CoverPrice, -1),"Ref(CoverPrice,-1)",6.3);
> > > AddColumn(CoverPrice,"CoverPrice",6.3);
> > > AddColumn(H,"H",6.3);
> > >
> > > ----------------------------------------
> > >
> > > Run the above exploration against any current issue (I'm
> testing with
> > > SPY) in AB and you will see that in the statement:
> > >
> > > x = Min( Ref(H,-1) , Ref(CoverPrice, -1) );
> > >
> > > variable x is ALWAYS being assigned the value of Ref(H, -1)
> instead of
> > > the lowest value of the two values.
> > >
> > > Am I missing something or is this an AB issue that I need to
> refer to
> > > Tomasz?
> > >
> > > Regards,
> > >
> > > Phsst
> > >
> > >
> > >
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