|
PureBytes Links
Trading Reference Links
|
Hello,
It is not always -1. Once you feed the data it won't be -1 anymore
and if local data storage is set to enabled (IMPORTANT!) it will stay > 0 between runs.
Use QuoteTracker plugin source code included in the ADK.
LastBar update date is the datetime of Quotes[ nLastValid ]
(provided that nLastValid > 0 )
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "Sachin" <sachin_13@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Tuesday, October 02, 2007 1:06 PM
Subject: [amibroker] Re: Data Plugin / Preserve Database
> What about nLastValid on startup of the plugin , which is always -1.
> How does it know which is the last bar updated and which bar to update
> next. Even on exiting the Preferences menu nLastValid is set to -1
> when GetQuotes is called.
>
> Help TJ.
>
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx> wrote:
>>
>> Hello,
>>
>> It is automatically saved. You need to go to File->Database Settings
>> and define number of bars to be preserved there.
>> And make sure that "Local data storage" is set to "Enabled.
>>
>> Best regards,
>> Tomasz Janeczko
>> amibroker.com
>> ----- Original Message -----
>> From: "Sachin" <sachin_13@xxx>
>> To: <amibroker@xxxxxxxxxxxxxxx>
>> Sent: Tuesday, October 02, 2007 9:14 AM
>> Subject: [amibroker] Data Plugin / Preserve Database
>>
>>
>> > How to make AB preserve a database for a streaming real time source
>> > which does not support backfill/hist. data from the remote server and
>> > depends on the current price to build the database and is updated
>> > using ::SendMessage(ParentWn,WM_USER_STREAMING_UPDATE... -> GetQuotes
>> > Mechanism and not the Timer mechanism ?
>> >
>> > When writing a RT data plugin nLastValid always is -1 when GetQuotes
>> > is called for the first time so automatically on startup the previous
>> > quotes are deleted
>> >
>> > also
>> >
>> > when the timer event fires periodically ( Preferences -> Intraday ->
>> > Realtime chart refresh ) again GetQuotes is called with the value of
>> > nLastValid as -1.
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > 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
>
>
>
>
>
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/
|