Re: [amibroker] Re: once again, this AFL fights you every step of the way. Sorry, this is a badl, AmiBroker Email List Archive

On 6/6/07, Fred <ftonetti@xxxxxxxxxxxxx > wrote:

You understand loops, but not ExRem (Signal) & Flip (State) ?

It would have been easy enough for you to come to your own
realization simply by looking at an exploration after using Flip and
then again after using Flip ...

In case you still don't understand,

Buy = Flip(Buy, Sell);
Sell = Flip(Sell, Buy);

... would set all values in the buy array to 1 from each buy until
the next sell and all values in the sell array to 1 until the next
buy ...

Buy = ExRem(Buy, Sell);
Sell = ExRem(Sell, Buy);

... would remove all but the original buy and sell in the respective
arrays ...

Now you can toss the loops and have your code run faster ...

--- In amibroker@xxxxxxxxxxxxxxx, Grant Noble <gruntus@xxx> wrote:
>
> As someone who struggled with ExRem I can understand the confusion.
> I eventually abandoned it and defined all my signals via loop code.
> The whole notion of state v. signal form is something that could do
with a little more explanation
> in the user guide - not all of us have engineering backgrounds.. G
>
> Tomasz Janeczko wrote:
> > Angelo,
> >
> > The purpose of ExRem is to convert from STATE form to SIGNAL form.
> > The difference is as between
> >
> > Buy = Close > MA( Close, 24 );
> >
> > and
> >
> > Buy = Cross( Close, MA( Close, 24 ) );
> >
> > First is state form, second is signal form. As far as default
mode of backtesting is considered
> > there is no much difference AS LONG as you don't combine multiple
conditions.
> >
> > But once you start using AND/OR it makes the difference.
> >
> > The other difference is when you are going to PLOT the chart (or
arrows using PlotShapes).
> > First form will give you "level" while second form will give
you "pulse".
> >
> > Use Exploration and charts to see what I am talking about.
> >
> > Best regards,
> > Tomasz Janeczko
> > amibroker.com
> > ----- Original Message -----
> > From: "Angelo" <ima_cons@xxx>
> > To: <amibroker@xxxxxxxxxxxxxxx>
> > Sent: Tuesday, June 05, 2007 10:46 AM
> > Subject: [amibroker] Re: once again, this AFL fights you every
step of the way. Sorry, this is a badl
> >
> >
> >> --- In amibroker@xxxxxxxxxxxxxxx, "Bob Jagow" <bjagow@> wrote:
> >>> You confuse signal with Buy/Sell.
> >>>
> >>
> >> I surely do.
> >>
> >> That's why I came here asking if someone has the courtesy of
explaining
> >> when/why there's the need to remove a signal that won't create
an
> >> actual Buy/Sell.
> >>
> >> If it is possble, otherwise life will be good all the same.
> >>
> >> Regards,
> >>
> >> Angelo.
> >>
> >>
> >>
> >>
> >>
> >>
> >> 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 NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> >> http://www.amibroker.com/devlog/
> >>
> >> For other support material please check also:
> >> http://www.amibroker.com/support.html
> >>
> >> Yahoo! Groups Links
> >>
> >>
> >>
> >>
> >>
> >
> >
> > 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 NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> > http://www.amibroker.com/devlog/
> >
> > For other support material please check also:
> > http://www.amibroker.com/support.html
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
>

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