|
PureBytes Links
Trading Reference Links
|
QuickAFL in AA is only enabled when using *MORE* than one symbol.
First execution (for first symbol) is used by AmiBroker to setup QuickAFL backward/forwardref
as explained here: http://www.amibroker.com/kb/quickafl/
This may and probably will change, because as you can see from new ActionEx status there is a plan
to init QuickAFL via special one-timeexecution
when formula is CHANGED only (i.e. when file modification date/time changes).
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "Fred" <ftonetti@xxxxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Friday, July 04, 2008 10:28 PM
Subject: [amibroker] Re: AmiBroker 5.14.0 BETA released
> As a followup to the speed aspect ...
>
> Even for a single symbol I don't see any difference between quickafl
> and not with the AFL below ... Is this because of the variable used
> in the length parameter as opposed to there being a constant there ?
>
> Again, thanks in advance ...
>
> Len1 = Optimize("Len1", 13, 2, 101, 1);
> Len2 = Optimize("Len2", 21, 2, 101, 1);
>
> X1 = EMA(C, Len1);
> X2 = EMA(C, Len2);
>
> Buy = Cross(X1, X2);
> Sell = Cross(X2, X1);
>
> --- In amibroker@xxxxxxxxxxxxxxx, Fred Tonetti <ftonetti@xxx> wrote:
>>
>> TJ,
>>
>>
>>
>> In regards to item #7 .
>>
>>
>>
>> - I seem to get a syntax error when using SetBarsRequired
> (sbsAll,
>> sbsAll) . to the effect that . variable sbsAll used without having
> been
>> initialized . Any ideas ?
>>
>>
>>
>> - If one has for loops etc how does one tell where the
> first bar is
>> ? i.e. if I write
>>
>>
>>
>> Beg = LastValue(ValueWhen(Status(FirstBarInRange"), BarIndex()));
>>
>> End = LastValue(ValueWhen(Status(LastBarInRange"), BarIndex()));
>>
>>
>>
>> For ( i = Beg; I <= End - 1; i++ )
>>
>> {
>>
>> X = C[i];
>>
>> }
>>
>>
>>
>> I get messages to the effect that I have a subscript out of range .
> Is there
>> something that I can do to check that a variable of an array is not
> out of
>> range or some value I can set Beg to in advance of the loop to keep
> these
>> messages from occurring ?
>>
>>
>>
>> - For good size watchlists, I'm not seeing much if any
> difference
>> in optimization times for some specific number of iterations. This
> with AA
>> From/To dates set to the last two years and QuickAFL turned on as
> opposed to
>> all quotes which span some 20+ years. Can you provide any insight
> as to why
>> that might be ?
>>
>>
>>
>> Thanks in advance
>>
>>
>>
>>
>>
>> _____
>>
>> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx]
> On Behalf
>> Of Tomasz Janeczko
>> Sent: Friday, July 04, 2008 5:39 AM
>> To: amibroker@xxxxxxxxxxxxxxx
>> Subject: [amibroker] AmiBroker 5.14.0 BETA released
>>
>>
>>
>> Hello,
>>
>>
>>
>> AmiBroker 5.14.0 BETA is released now:
>>
>> <http://www.amibroker.com/devlog/2008/07/04/amibroker-5140-beta-
> released/>
>> http://www.amibroker.com/devlog/2008/07/04/amibroker-5140-beta-
> released/
>>
>>
>>
>> CHANGES IN VERSION 5.14.0 (as compared to 5.13.0):
>>
>> 1. added support for Quarterly and Yearly intervals in all parts
> of the
>> program
>> 2. Changes to drawing made in v5.13 caused improper drawing lines
>> located PAST the last available quote (trendlines and pitchforks)
> when
>> timestamping method was "START TIME of interval". This is fixed
> now.
>> 3. Fixed AddSummaryRows so 'onlycols' parameter default (zero) is
>> applied properly
>> 4. Implemeted "Select all" via Ctrl-A keyboard shortcut for all
> list
>> (result list in AA for example)
>> 5. Mouse cursor shape (moving/sizing) reflects the selected study
>> priority when more than one study exists under mouse position
>> 6. new multiple Volume At Price charts at user-defined points
> via new
>> PlotVolumeOverlayA function
>> 7. QuickAFL can now be used in Automatic Analysis (Settings:
> General:
>> "Use QuickAFL" - check this box) - this can speed up explorations,
> scans and
>> backtests by factor of 2+ if range is less than "all quotations".
> More on
>> this: <http://www.amibroker.com/kb/quickafl>
>> http://www.amibroker.com/kb/quickafl
>> 8. Range Bars compression now uses TickSize as "1R step".
> TickSize
>> defined in the Symbol Information, if its value is zero, then 1R
> would be
>> equivalent to 0.01 movement (for backward compat)
>> 9. selecting date in multiple linked charts is now faster because
>> redraw is not made when selected line in higher compressed interval
> remains
>> in place
>> 10. selector line in linked charts works OK now, regardless of
> selected
>> time compression timestamping method
>> 11. SetBarsRequired accepts now values -2 in special meaning:
> reference
>> ALL bars
>> 12. Sometimes progress bar did not show the name of optimization
> engine
>> used. Now it is fixed
>> 13. Status("ActionEx") provides more codes than Status("action")
> to
>> detect special executions states
>> 14. Streaming chart update could stall if trend line handle was
> clicked
>> in attempt to resize and released in the very same position
> (without moving
>> the mouse). Now it is fixed.
>> 15. TimeFrameMode() now supports mode == 4 - which expresses
> RANGE bars
>> in TickSize units (as opposed to mode 3 that uses dollars for
> backward
>> compatiblity)
>> 16. when display chart timing option is turned on and RT stream is
>> active the application STATUS BAR now displays TOTAL time for all
> charts, it
>> should be BELOW 1 second for RT trading
>>
>>
>> Best regards,
>> Tomasz Janeczko
>> amibroker.com
>>
>>
>>
>>
>> _____
>>
>> I am using the free version of SPAMfighter for private users.
>> It has removed 497 spam emails to date.
>> Paying users do not have this message in their emails.
>> Try SPAMfighter <http://www.spamfighter.com/len> for free now!
>>
>
>
>
> ------------------------------------
>
> 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
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/amibroker/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/amibroker/join
(Yahoo! ID required)
<*> To change settings via email:
mailto:amibroker-digest@xxxxxxxxxxxxxxx
mailto:amibroker-fullfeatured@xxxxxxxxxxxxxxx
<*> To unsubscribe from this group, send an email to:
amibroker-unsubscribe@xxxxxxxxxxxxxxx
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|