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Hello,
If you think it is superior - voila - go to File->Database Settings,
set Base time interval to 1-minute, then backfill,
then switch to tick and backfill again.
You will get the same result.
Personally I don't think it is superior because
a) getting 1-minute, 30 sec and 1 second data requires
THREE backfills and it is THREE times slower
b) above also consumes 3x the bandwidth
As for "tick backfill" there is no such thing in TWS - it offers
only 1 second finest resolution.
As for "actual trading" - regardless of periodicity selected
last (current) bar is always updated with every tick.
And if you can't use AmiBroker - that's fine with me -
please go on and use other platform and stop wasting bandwidth here.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "bj012859" <byronjames@xxxxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Wednesday, October 19, 2005 3:54 PM
Subject: [amibroker] Re: Sierra charts vs. Amibroker on IB backfills
>
> OK, on futher evaluation, on sierra charts I have the back fill set
> for maximum 5 day backfill, it goes and gets the data in increments
> of 30 sec's, then reverts to second based data as it gets new data
> from the API. This method, I find far superior. It allows enough
> data to see what happened on prior days, sets up my indicators so
> that I can intraday trade, and reverts to the fastest level for
> actual trading.
>
> Thomas, please consider the above approach as a plugin option, to
> allow full 5-day backfill (at less resolution) when using tick or
> second based database. A possibility could be to allow the 5-day
> backfill at 30sec or 1m, then refill at the 5 sec, then at the 1sec
> or tick level, to get the most and best data based on what the user
> has set in their database. True, this would be a slower backfill
> option, and plenty are whining about backfill speeds, but without
> 24h backfill minimum, I can't use Amibroker as an intraday trading
> platform.
>
> Thx,
>
> --- In amibroker@xxxxxxxxxxxxxxx, "bj012859" <byronjames@xxxx> wrote:
>>
>> Hope I'm doing something wrong because I would rather use
> amibroker
>> because of the ease in programming; but, I am not getting even
> close
>> to the same backfills between the two products (using same
> computer
>> and same IB API. I read a message that stated that if you set the
>> database to ticks then u will only get 1000 bars of data under
>> amibroker. That's what it appears i'm getting with AB 4.73beta
> and
>> 1.43 plugin. Sierra chart is giving me 5 full days worth of
> second-
>> based data somehow (their sw is set up to provide 120 days, but 5
>> day limitation is with IB).
>>
>> I use 250, 600 & 3000 volume charts for trading, hence second or
>> tick based feed is critical. I like the way amibroker displays
> the
>> volume charts, much better than sierra, but can't get by with the
>> extremely limited backfill provided through amibroker.
>>
>> The packages use the same IB API. I just don't get it. If there
>> are any other sierra chart users here, please help Thomas to
>> understand the difference in backfill methods, so that we can have
>> the same amount of backfill data as sierra users.
>>
>> Thx,
>>
>
>
>
>
>
>
>
> 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 other support material please check also:
> http://www.amibroker.com/support.html
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
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