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> State:=BarsSince(Init OR N)<(BarsSince(Init OR X);
Notwithstanding the error in the formula above, the ValueWhen() function
can get around the BarsSince() function's multiple limitations with
plotting the first trade entry signal, specially when there is no exit
signal as yet.
For more on this, see the "Trade signals v4.0" formulae from
http://www.metastocktools.com/#metastock
jose '-)
http://www.metastocktools.com
--- In equismetastock@xxxxxxxxxxxxxxx, "Roy Larsen" <rlarsen_quik@xxx>
wrote:
>
> Dean
>
> I wondered what the WriteIf() was doing in an exploration.
>
> Almost every trick that can be applied to indicators can also be applied
to experts, and the "Init" bar is particularly helpful with a latch
configuration that's based on BarsSince(Event A) relative to
BarsSince(Event B). Typically Event A could be Buy and event B a Sell, but
not necessarily.
>
> The only significant difference between an indicator, exploration column
or section of an expert is the way in which the result is communicated.
>
> N:= "your set signal";
> X:= "your reset signal";
> Init:=Cum((N OR X) >-1)=1;
> State:=BarsSince(Init OR N)<(BarsSince(Init OR X);
> State;
>
> Init can also be constructed as follows.
>
> Init:=Cum(IsDefined(N OR X))=1;
>
>
> Roy
>
> ----- Original Message -----
> From: longhair4277
> To: equismetastock@xxxxxxxxxxxxxxx
> Sent: Friday, March 16, 2007 12:47 PM
> Subject: [EquisMetaStock Group] Re: Cannot get an indicator to trigger
first time around.
>
>
> Thanks for the reply, but OOPPSS, what a screw up I just made.It's
> been a looong day...
> I meant an "Expert Advisor", not an "Explorer" Sorry about that.
> Thanks
> Dean
> --- In equismetastock@xxxxxxxxxxxxxxx, "Roy Larsen"
> <rlarsen_quik@> wrote:
> >
> > Longhair
> >
> >
> > There are several ways to eliminate such errors in the Explorer.
> An Init function might be part of the solution and is usually
> helpful with BarsSince() / ValueWhen() type functions. Another
> useful device is to pass an N/A result to one of the Forum DLL
> functions (Summing 1 period of the troublesome output should do it).
> This converts N/A to 0 which is much easier to work with. If you can
> manipulate your code to output zero when there has been no signal in
> the scanned range you then have the opportunity to filter out all
> invalid/zero results.
> >
> > The golden rule with all explorations is, of course, to scan
> sufficient bars to produce the required result. While this is not
> always possible, using "Minimum Records" is guaranteed to fail when
> BarsSince() / ValueWhen() type functions are included in exploration
> formulas.
> >
> >
> > Roy
> >
> >
> > ----- Original Message -----
> > From: longhair4277
> > To: equismetastock@xxxxxxxxxxxxxxx
> > Sent: Friday, March 16, 2007 11:59 AM
> > Subject: [EquisMetaStock Group] Re: Cannot get an indicator to
> trigger first time around.
> >
> >
> > --- In equismetastock@xxxxxxxxxxxxxxx, "Jose Silva"
> > <josesilva22@> wrote:
> > >
> > > Init:=Cum(IsDefined(RoaR))=2;
> > >
> > > Steve, the Init variable above holds an initialization signal
> when
> > the
> > > RoaR plot has been defined/valid (i.e., not N/A) for two bars.
> > This
> > > initialization/seeding is necessary because the BarsSince()
> > conditions
> > > create null (N/A) bars prior to the first crossover reference
> > signal.
> > >
> > > So, why not "Init:=Cum(IsDefined(RoaR))=1;" instead?
> > > Because the Cross() function adds a null bar and would miss that
> > first
> > > initialization signal.
> > >
> > > Creates/adds null bars? It sounds like "creating a void or
> > vacuum".
> > > Doesn't sound right but hopefully you get my meaning.
> > >
> > >
> > > jose '-)
> > > http://www.metastocktools.com
> > >
> > >
> > Is there anyway do do an "init" in an explorer?
> > As an example of what I am trying to accomplish. This is a snipet
> of
> > the code that I have in the explorer:
> > The most recent High Beta was writeif( BarsSince(Fml( "!QUTSH -
> > Setup Day - High Beta") ) < BarsSince(Fml( "!QDTSH - Setup Day -
> > High Beta") ) , "an UPTREND" , "a DOWNTREND")
> >
> > This produces the following error until I get 1 valid signal:
> > (*ERROR*: Function is not defined for the current date)
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