AmiBroker Knowledge Base » Charting http://www.amibroker.com/kb Providing you with tips & tricks for everyday AmiBroker use Sat, 17 Dec 2011 10:18:10 +0000 http://wordpress.org/?v=2.8.4 en hourly 1 How to display the indicators based on Advances/Declines http://www.amibroker.com/kb/2007/07/30/how-to-display-the-indicators-based-on-advancesdeclines/ http://www.amibroker.com/kb/2007/07/30/how-to-display-the-indicators-based-on-advancesdeclines/#comments Mon, 30 Jul 2007 12:01:59 +0000 Marcin Gorzynski http://www.amibroker.com/kb/2007/07/30/how-to-display-the-indicators-based-on-advancesdeclines/ In order to display indicators based on Advances/Declines first of all it’s necessary to calculate composities in the database:
  1. Open Categories window using Symbol->Categories menu item.
  2. Select base index for given market in Markets tab and Base indexes for – Composites combo.
    For example if you are following NYSE this can by ^DIJ (Dow Jones Average)
    (certain symbol must be marked as index in Symbol -> Information and must belong to the same market)
  3. Choose Symbol ->Calculate composites  menu item to open the window shown below and mark:
    - Number of advancing/declining issues and
    - Apply to: all quotes, All markets
  4. Click Calculate . From now on ADLine, AdvVolume() and TRIN indicators will be visible.

Q: Why does AB need “base index”?
A: Just because it may happen that not all stocks are quoted every businness day and AB needs must calculate number of advancing/declining issues per market. So it checks the “base index” quotations dates and tries to find corresponding quotes of all stocks belonging to that market to find out how many issues advanced, declined and not changed at all.

Q: What are “Volume for base index” and “Copy volume to all indexes” checkboxes for?
A: “Volume for base index” and “Copy volume to all indexes” are provided in case you DON’T have real volume data for index quotes. In that case AmiBroker can calculate volume for index as a sum of volumes of all stocks belonging to given market. First option assigns calculated volume only to “base index”, the second copies the volume figure to all indexes belonging to given market.

]]> http://www.amibroker.com/kb/2007/07/30/how-to-display-the-indicators-based-on-advancesdeclines/feed/ 0 How to make vertical selection line thinner http://www.amibroker.com/kb/2007/02/26/how-to-make-vertical-selection-line-thinner/ http://www.amibroker.com/kb/2007/02/26/how-to-make-vertical-selection-line-thinner/#comments Mon, 26 Feb 2007 11:16:59 +0000 Tomasz Janeczko http://www.amibroker.com/kb/2007/02/26/how-to-make-vertical-selection-line-thinner/ Preferences, Colors tab, and uncheck Bold box, as shown in the picture below. Then click OK [...]]]> AmiBroker 4.90 now has thick vertical selector line that plots behind chart lines to improve clarity and readability (selector does not cover candlesticks). Some users however prefer thin, single-pixel line. There is an easy way to switch.

Simply go to Tools->Preferences, Colors tab, and uncheck Bold box, as shown in the picture below.

Preferences Window

Then click OK to apply changes.

Note: If you don’t have auto-saving of preferences turned on (it is ‘on’ by default) you may also need to
choose Tools->Save Preferences.

]]> http://www.amibroker.com/kb/2007/02/26/how-to-make-vertical-selection-line-thinner/feed/ 0 How to save layouts that hold individual parameter values for different symbols. http://www.amibroker.com/kb/2006/10/16/how-to-save-layouts-that-hold-individual-parameter-values-for-different-symbols/ http://www.amibroker.com/kb/2006/10/16/how-to-save-layouts-that-hold-individual-parameter-values-for-different-symbols/#comments Mon, 16 Oct 2006 10:42:53 +0000 Marcin Gorzynski http://www.amibroker.com/kb/2006/10/16/how-to-save-layouts-that-hold-individual-parameter-values-for-different-symbols/ By default the values of parameters for given indicator pane are the same (shared) for all symbols. If you want per-symbol parameters, you need to apply technique descibed in this short article.

Since the layout does not store parameter values (parameters are chart specific – i.e. they are assigned to the chart recognised by CHART ID) – then it’s not enough just to switch to another symbol, set new parameters and save another layout.

If parameter values are changed in the same chart – these changes will not be stored in the layout, because the same pane is still displayed (and the parameters are saved for that particular CHART, not symbol).

So – it’s necessary to do the following:
- set parameters and save layout for 1st symbol,
- now – display another chart pane from CHARTS window, e.g. double-click on: Charts / Basic Charts / Price (all in one)
- close the previously used chart pane
- set the parameters in the new chart,
- save the new layout

The new chart has different ChartID number, hence any changes will not affect the one previously used layout/chart pane.

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