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Stephane,
It is possible to retrieve any variable from the level of
plugin DLL (GetVariable() function from SiteInterface),
so you don't need to pass buy/sell, short/cover variables
as arguments.
On the other hand you can pass them as arguments as
you suggested - it is a matter of your choice.
But... as I mentioned there is a caveat here:
you have to write BetterApplyStop as the last one in your formula
to make sure buy/sell/short/cover arrays are in their final shape,
and you can not use resulting line to reevaluate your buy/sell points
otherwise your function output will not be consistent with backtesting results
Best regards,
Tomasz Janeczko
===============
AmiBroker - the comprehensive share manager.
http://www.amibroker.com
----- Original Message -----
From: "Stephane Carrasset" <nenapacwanfr@xxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Wednesday, November 28, 2001 3:53 PM
Subject: [amibroker] Re: Apply Plot
>
> OK,
>
> so If i want Built a plugin dll for a BetterApplyStop, I must have
> two arrays and the stop,
> BetterApplyStop ( array buy, array sell, stop)
>
> stephane
>
>
> >
> > I think I already mentioned the reasons.
> >
> > ApplyStop does not generate any "magic" level line at the
> > time of formula execution.
> >
> > All it does - is just setting internal back-tester variables
> > that are used during back-testing.
> >
> > This is so because back-testing is iterative process that
> > is executed bar by bar oposite to the normal AFL formula
> > statements that are executed on whole arrays at once.
> >
> > Let's suppose that we have "BetterApplyStop" function
> > that returns the stop level line.
> > Let's say you write the following formula:
> >
> > buy = ...something...
> >
> > stoplevel = BetterApplyStop( 2,2,2*ATR(10),1 );
> >
> > sell = ... some calculation using stop level ....
> >
> > Because AFL operates on whole arrays and the lines of
> > code are evaluated only once
> > the BetterApplyStop would not know about your sell formula and
> would generate
> > wrong stoplevel line since it would assume that there is no sell
> formula.
> >
> > This will lead to the non consistent results between backtesting
> > and the value returned by BetterApplyStop.
> >
> > This is the reason why ApplyStop does not return the stop level
> line.
> >
> > Best regards,
> > Tomasz Janeczko
> > amibroker.com
> >
> >
> > ----- Original Message -----
> > From: "CARRASSET Stephane" <nenapacwanfr@xxxx>
> > To: "'amibroker'" <amibroker@xxxx>
> > Sent: Wednesday, November 28, 2001 2:52 PM
> > Subject: [amibroker] Apply Plot
> >
> >
> > > Tomacz,
> > >
> > > Applystop is certainly a powerfull tool, but why you don't allow
> us to
> > > visualize the level of an applystop on a chart
> > >
> > > stephane
> > >
> > >
> > > Buy= Cross(C,MA(C,20));
> > > Sell= Cross(MA(C,20),C);
> > > ApplyStop(2,2,2*ATR(10),1);
> > >
> > >
> > > Graph0=C;
> > > Graph0Color=1;
> > > Graph0Style=64;
> > > Graph1= ApplyStop(2,2,2*ATR(10),1);
> > > Graph1Color=6;
> > > Graph1Style=1;
> > >
> > >
> > >
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
> > >
>
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
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