Yes we will be looking to support 64 bit once a new 64 bit AmiBroker is
compiled by Tomsasz... right now we have incorporated features into it
that require v4.28+ but v4.22 was the last 64 bit version released so
we'll have to wait for now.
Best regards,
Richard Dale.
Norgate Investor Services
- Premium quality Stock, Futures and Foreign Exchange Data for
markets in Australia, Asia, Canada, Europe, UK& USA -
www.premiumdata.net
-------- Original Message --------
Subject: Re: [amibroker] PremiumData Question
From: Steve Dugas <[email protected]>
To: [email protected]
Date: Thu, 14 Jan 2010 11:24:01 -0500
Hi Richard - Your upcoming plugin sounds great, just wondering if it
will be 64-bit? With 64-bit computers and OS's increasingly becoming
the norm and 64-bit AmiBroker waiting in the wings, it would be real
nice if just one maintenance-free data provider could provide a 64-bit
API/plugin and remove the 3GB bottleneck for us. And perhaps get a
bunch of new customers...Thank you Sir!
Steve
----- Original Message -----
*From:* Richard Dale <mailto:[email protected]>
*To:* [email protected] <mailto:[email protected]>
*Cc:* patsgreatdeals <mailto:[email protected]>
*Sent:* Sunday, January 10, 2010 5:00 AM
*Subject:* Re: [amibroker] PremiumData Question
I'll try and explain how this works. It's all a bit complicated.
There's three "databases" at work:
1. Premium Data's MetaStock format database
2. AmiBroker's native price database
3. AmiBroker's security details database
There are two settings available:
Use Local Data Storage - either Enabled or Disabled
Data Source - either MetaStock Plug-in or Local Database.
The default setting is when you set "Use Local data storage" to
false and Data source: MetaStock Plugin. This uses databases 1
and 3. Database 1 is updated using the Premium Data program.
Database 3 is maintained using the Tools->US-PremiumData command.
Normally Database 2 isn't used, except for composite symbols you
might create.
Why would we want to change this?
Some people have commented that accessing AmiBroker's native price
database is quicker for large backtests. So how do we copy data
from database1 into database 2? Set "Local data storage" to
Enable and Data source - MetaStock Plugin, then any time you
access a security in database 1, a COPY of the data is placed into
database 2. Some people run a scan across all data to popuulate
this (eg. with an entry condition that is always true).
How do we then use that copied data? Set ""Local data storage" to
Enabled and Data source to Local Database. Note that any updates
to database 1 will no longer be reflected in database 2.
Now, should there be any maintenance required, you should either
change back to the default setting or to the second setting.
Ensure you run Tools->US-PremiumData in this mode too.
If you decide that maintaining a duplicate of the price data in
Amibroker's natvie price database is too cumbersome, then return
the settings to default as described above. Then shut down
AmiBroker. Make a backup of the entire C:\Program
files\Amibroker\US-PremiumData folder. Delete the A-Z folders
inside the folder C:\Program Files\AmiBroker\US-PremiumData
folder. Start AmiBroker. Click Tools->US-PremiumData.
_What we are doing to improve this_
We are developing a native plugin to AmiBroker and also getting
rid of the MetaStock file format. This should provide significant
performance increases (so there is no need to utilise a native
price database), automatically the database on-the-fly as
code/symbol changes occur (i.e. no need to run
Tools-US-PremiumData) plus also give us extra flexibility to offer
new features (such as historical index constituents - eg. you will
be able to specify in your entry conditions during backtesting
"S&P 500 constituent" = true and this will use the historical set
of S&P500 constituents on each relevant day to determine whether
the entry condition is true. This is the ultimate
survivorship-bias-free form of testing.
Best regards,
Richard Dale.
Norgate Investor Services
- Premium quality Stock, Futures and Foreign Exchange Data for
markets in Australia, Asia, Canada, Europe, UK& USA -
www.premiumdata.net
-------- Original Message --------
Subject: [amibroker] PremiumData Question
From: patsgreatdeals <[email protected]>
To: [email protected]
Date: Sun, 10 Jan 2010 05:14:24 -0000
I was wondering when using PremiumData.net feed and switching
checking "Use Local Data" so that AMIBroker will run faster with
the data in the AMIBroker Database....
what happens when the PremiumData downloader renames symbols? I
saw a bunch being renamed, will the AMIBroker DB then have two
symbols one with the old name, and one with the renamed symbol?
