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What makes you think it is an emergency solution?
I think it is a very clever one. In fact, the fewer the files the
better.
nand
--- In amibroker@xxxxxxxxxxxxxxx, "Lesmond V" <ebsn247@xxxx> wrote:
>
> Tomasz,
>
> I absolutely agree with almost everything you said. AB is obviously
> far superior to both QCharts and SierraChart.
>
> The only problem I see with AB is its inability to store separate
eod
> and intraday data files for the same symbol in the same database.
>
> Mixed mode (both eod and intraday data in the same file) is an
> interesting feature and it's nice to have it but I to me it looks
> like an emergency solution. This just doesn't seem to be the right
> method of storing the data permanently.
>
> The proper way seems to be to have two separate data files for the
> same symbol: one with eod data and one with intraday data, and,
> ideally, both files should be in the same database, which is
> currently not possible with AB. As a result, if you don't want to
use
> "mixed eod/intraday mode" you have to run two separate instances of
> AB, one for eod and one for intraday charts.
>
> This is the only area where SierraChart is superior to AB. In Sierra
> eod files have different extension than intraday files so all the
> files can be stored in the same database.
>
> Lesmond
>
> ---------------------------
> Message #81122 from Lesmond
> Re: Potential Amibroker Buyer rapidly losing interest
>
> As a new user of AB and long time user of other charting packages I
> find the whole issue of mixing EOD and intraday data in one file or
> suggestions to run two separate instances of AB (one for EOD charts
> and one for intraday ones) confusing at best.
>
> In SierraChart eod files have extension DLY and intraday files have
> extension MND and all those files (with exactly the same file=symbol
> names) are stored together in the same folder and then pull-up for
> charting from within the same database using separate eod/intraday
> menus. This file structure is easy to manage and very flexible.
>
> In QCharts you can pull an eod chart and then in the next window
5min
> chart for exactly the same symbol.
>
> Lesmond
>
> -----------------------------------
> Message #81127 from Tomasz Janeczko
>
> " In QCharts you can pull an eod chart and then in the next window
> 5min chart for exactly the same symbol".
>
> You can do exactly the same in AmiBroker. You can also backtest
> different intervals and even switch intervals inside one formula
> (TimeFrame functions). AB is simply superior to anything you
> mentioned.
>
> Using mixed EOD/intraday mode you have both intraday and eod
> histories available at the same time. So no product you mentioned
> provides anything more than AB. In fact they are inferior when it
> comes to handling huge eod databases.
>
> Tomasz Janeczko
>
> -----------------------------------
> Message #81126 from Tomasz Janeczko
>
> As you know well, QCharts is
> a) hard-wired to one data source (quote.com)
> b) does not store data locally at all (all data are constantly
> downloaded from internet)
> c) does not even have 20% of features as AmiBroker (no "automatic
> analysis" at all)
>
> For this reason the solution they use (i.e. not storing data locally
> at all and downloading everything constantly from the web) is
> suitable for them.
>
> It is unfortunatelly completely unsuitable for application like
> AmiBroker that needs local database to make quick backtesting/
> explorations possible.
>
> The same appplies to SierraChart - this product is focused on
> charting, not on data mining / analysis / backtesting.
>
> AmiBroker is mainly analysis / backtesting platform that is
optimized
> to perform huge data mining (ten thousands of symbols and very long
> histories). Such work is completely beyond capabilities of QCharts/
> SierraChart.
>
> AmiBroker with its file structure having ability to store tens of
> thousands of files and plugin architecture allowing linking to ANY
> data source is far superior to those products because it provides
> flexibility and speed not available anywhere else. This includes
> ability to use Quote.com as real-time data source (plus of course
> many others).
>
> Try using the products you mentioned on database that holds 60000
> symbols (like QP2 for example) and make any analysis and you will
> start to understand why AB is superior.
>
> No other product is able to work at huge EOD database and on
> real-time intraday databases at the same time maintaining speed and
> flexibility.
>
> Tomasz Janeczko
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