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values with the identifier [0] define a value at that barindex number
C[0] is value of close at barindex()==0, ie first bar of the chart
C[1] is value of close at barindex()==1, ie second bar of the chart
current bar close is just C
previous bars use ref function
eg
Filter = (Close > 4.0) ;
AddColumn(Close, "Close");
AddColumn(ref(Close,-1), "Close-1");
--
Cheers
Graham
AB-Write >< Professional AFL Writing Service
Yes, I write AFL code to your requirements
http://www.aflwriting.com
On 12/11/06, bestbobleonard <bestbobleonard@xxxxxxxxx> wrote:
>
> Thanks Terry..
>
> But I need to do this during an "Explore"
>
> My long term averages are 30 days and would not work (I don't think)
> I think it has to be done in a function. I have another qualifier
> that I only want to test 10 days back.
>
> I did eliminate close[0].
> Do you know know why close[1] and close[2] don't give we what I
> expect?
>
> Thanks
> BobL
>
>
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Terry" <MagicTH@xxx> wrote:
> >
> > You are using subscripts [0] in AddColumn. They should not be
> there.
> >
> > Normally Filter = 1; to see all bars of data, or Filter = Buy; to
> see
> > only bars with Buy signals. You can certainly do Filter = C > 4.0
> to see
> > only bars where the Close is greater than 4.0. You can even use
> Filter >
> > barCount - 15; to see just the last 15 days of AddColumn(), but
> you must
> > remove all the subscripts[0]. All you need is the first
> > AddColumn(Close,"Close"); which shows all bars that match the
> Filter.
> >
> > You can also Explore just the last 15 days in AA by setting n bars
> or
> > last n days to 15, same results on a daily database, different if
> using
> > intraday data, and setting Filter = 1;
> > --
> > Terry
> > -----Original Message-----
> > From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]
> On
> > Behalf Of bestbobleonard
> > Sent: Saturday, November 11, 2006 08:58
> > To: amibroker@xxxxxxxxxxxxxxx
> > Subject: [amibroker] Newbie Problem Looping the last 15 days. It
> maybe
> > me. Maybe AMI broker.
> >
> > Hi,
> >
> >
> > I want to back test the last 15 days (ONLY) for some data
> anomalies
> > like gapup, etc. I have a simple (STARTER!) function for this
> > below. I'm beginning to think I don't see array processing
> > correctly.
> >
> > I did read the manual on arrays and it's not clear on some points
> so
> > finally I did the following:
> >
> > Filter = (Close[0] > 4.0) ;
> >
> >
> > AddColumn(Close, "Close");
> > AddColumn(Close[0], "Close0");
> > AddColumn(Close[1], "Close1");
> > AddColumn(Close[2], "Close2");
> >
> >
> > Which gets:
> > Ticker Date/Time Close close1 close2 close3
> close4
> > JCP 11/9/2006 79.55 53.75 52.21 53.40 54.18
> >
> >
> > Clearly, I'm not getting correct elemens of the array. The values
> > shhould all be it ther $70's. Maybe I misunderstood the
> > Manual but the page on arrays is skimpy and poorly written.
> >
> >
> > Maybe someone can just point me to some better
> > examples/documentation.
> >
> > I read it that "close[0] equals day1 in his tables??"
> >
> > I'm using QP3.
> >
> > Or maybe show me what's wrong with the below function.
> >
> > Thanks for Any suggestions,
> > BobLenard (programming newbie)
> >
> >
> > // *************************
> > ////
> >
> >
> > function Dropper(period)
> > {
> > yesno = 0;
> >
> > global dropdelta;
> >
> > dropdelta[0] = 0; //initaliation & needed for debug!
> >
> > for (i = 1; i <= 15; i++)
> > {
> > dropdelta [i] = High[i] - Low [i +1 ] ;
> > }
> >
> >
> > for (j = 1; j <= period; j++)
> > {
> > if ( dropdelta[ j ] < 0)
> > yesno = 1;
> > }
> >
> > return yesno;
> >
> > }
> >
> >
> > gotadrop = Dropper(15);
> >
> >
> > Filter = (Close[0] > 4.0) ;
> >
> > AddColumn(Close, "Close");
> >
> > AddColumn(dropdelta[1], "dtest1");
> >
> > AddColumn(dropdelta[2], "dtest2");
> >
> > AddColumn(dropdelta[3], "dtest3");
> >
> > AddColumn(dropdelta[4], "dtest4");
> >
> >
> >
> >
> >
> >
> >
> > 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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