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Thanks Tomasz,
I can understand that you have so many things to do andtrust
your judgement to prioritize the different request/improvement in
Amibroker ! So I apologies if some time I point different aspect of
AmiBroker that annoying me.
Like most of us, I am still amaze at the speed
you improve Amibroker !
Furthermore, you take the time to give support and answer to
our personal concern and request !
Again thanks and congratulation for all your hard work
!
Jon.
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Tomasz Janeczko
To: <A title=amibroker@xxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Thursday, September 13, 20013:05
PM
Subject: Re: [amibroker] Re:
foreign
Hello Jan,
Recalculation is a reminiscence of the old days
when scrolling was not
"live" and saving memory for the buffers was
important.
It will be re-enginereed some time in the
future.
Best regards,Tomasz Janeczko===============AmiBroker - the
comprehensive share manager.<A
href="">http://www.amibroker.com
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
jonf
To: <A
title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Thursday, September 13,2001
5:26 PM
Subject: Re: [amibroker] Re:
foreign
Tanks b,
Very interesting and twisted way to preprocess and analyze
foreign symbol !
Unfortunately your solution is not viable to me, I want to
analyze and view 1000s of stocks compare to the overall market, and
each market group index.
I hope the speed will be improved in AmiBroker 7.8
!
Even with the explanation of Tomasz, I really don'tsee
why it's so slow to match all dates together, it shouldn't take more time
than looping to all the data once (an operation that most indicator
do) ? Also I still don't understand why this operation is done
every-time you touch the scroll bar ?
Jon.
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
b519b@xxxxxxxxx
To: <A
title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Thursday, September 13, 2001
10:23 AM
Subject: [amibroker] Re:
foreigh
Jon,If you are doing extensive optimization
retesting on one or two stocks, here is an approach that is working
well for me as I am in the middle of extensive backtesting of
variations on a single ETF. It takes some time to set up, but
optimization retesting is lightening fast. The following example is a
bit simplier than I use because I build a custom indicators from 50+
stocks in Excel, but the following will give the general idea.
1. Export all the data for a stock (such as IBM).2. Import it
into Excel.3. Import the "foreign" data into Excel (I'll use the DJIA
for illustration purposes).4. Double check that the dates match
for the stock data and the foreign data. One could write an Excel
function to do this, but I just eyeball it. Usually if one gets the
first date to match the rest match up with almost no further
changes.5. Save the new data as a csv file giving it a compound name
such as IBMxDJIA.6. Use the import wizard in AB to select thedata
one wants from each of the components. Currently there are only 6data
slots in AB (Open, High, Low, Close, Volume, Open Interest), so you
will have to decide which IBM data to drop to get a space for what you
want from the DJIA. Since my indicator forumulas usually ignore
Volume, that is where I usually stick the first "foreign" data set. I
like to use the Volume slot because whatever is in Volume is
automatically displayed in the background of AB's default chart. It's
nice to see how the foreign indicator relates to the price movement.
7. If I need a second "foreign" data set, I have AB import it into
the OI slot since I never use OI. If needed one could put foreign
data into the High and Low slots, but that often produces charts that
look very confused and it might affect any stop loss elements, soI
try to leave H and L unchanged. Also I make sure all my custom
indicators are above zero since I don't know how AB would react if a
stock has negative volume for a day.8. I then make a custom
version of my indicator formula which could be named
IBMxDJIAxBuyLowSellHigh and on the first line of the formula I include
a note recording what data is in each of the 6 stock data points in
the combo stock IBMxDJIA: for example, //O = Open of IBM//C=
Close of IBM//V = Close of DJIA//OI = Open of DJIA9. Any
backtesting using this combo stock (IBMxDJIA) is lightening
fast. 10. I hope the need for the above will disappear
at some point in the future if AB includes a match feature.
Hope this helps in the meantime.b--- In
amibroker@xxxx, "jonf" <jonf_ca@xxxx> wrote:> Thank a lot for
this Tomasz,> > Using foreign only once help a little but Is
it possible to avoid calculation (not only for foreign, but for
everything) each time we use the scroll bar !> > Jon
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