Create Market Scan

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New Market Scan - Create

Users can create new Market Scans, they can be either on-line or off-line.

Users cannot create pre-computed scans.

Open a new Scan

There are two ways to open a new scan: File/New/Market Scan or the New market scan command button.

File menu – New submenu

Select New Market Scan from the New submenu of the File menu:

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The Market Scan work page will open with the Search Criteria tabbed page open, see below.

New Scan Command Button

Alternatively, select Market Scanner from the Scanners drop-down menu in the toolbar.

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The Market Scan work page will open with the Search Criteria tabbed page open, see below.

Select On-Line or Off-line Scan format

After being prompted to Name the Scan, you will be asked whether you want to create an off-line or on-line scan:

mrktscan_offlinewarngps.gif

Click No to create an Off-Line Scan, allowing a full range of scanning criteria.

Click Yes to create an On-Line Scan, allowing a limited range of scanning criteria [see next].

On-Line v Off-Line Market Scans

Your SOFTWARE has two types of market scans: On-Line and Off-Line.

There are a number of differences between the two types, particularly in relation to the scope of the scan and the criteria types that can be scanned.

Off-Line scans require all the necessary market data to be downloaded onto your computer before the scan begins.

This takes some time and requires resources to be allocated to the local databases, which can become quite large, depending on the size of the market you are scanning.

On-Line scans are performed in real–time using the exchange's data on the data provider's server. The full range of a market’s price data that is scanned does not have to be downloaded onto your computer. It is a more efficient and simpler method of performing scans.

When the on-line scan identifies a trade, the full market data for that security or trade can then be downloaded.

The one restriction for on-line scanning is that Indicators cannot be scanned. They require the market data to be first downloaded, and then an off-line scan can be performed.

After making these selections, a blank market scan page, with the Search Criteria tab showing, will be displayed.

Search Definition

There are two steps to creating a new user defined market scan:

  • Select the parameters or scope of the scan
  • Define the scan criteria using one or more criteria expressions

Both of these steps are performed using the tools and controls on the Search Criteria tabbed page:

mrktscan_srchcritpagwrds.gif

The search is defined by a number of expressions which are created on the Search Criteria page, as well as the Scope of the search.

The Search Criteria tabbed work page is divided into two sections.

The Search On section defines the scope of the search

The Search Criteria section defines and manages the expressions which define the criteria of the search.

Search Scope

The Search On functions define the scope of the scan. The contents of the drop-down lists depend on the type of scan: On-line or Off-line.

On-line scans can only be applied to the national markets (including their indices) found in the Entire Markets category.

Off-line scans can be applied to all types of markets or groups available in the drop-down lists and their sub-lists.

Quote Lists

Off-line scans can be made on user-defined Quote Lists.

Select Quote Lists from the first drop down list, and then the required quote list the Select Quote List selector dialog box:

mrktscan_srchon_quotlists.gif

The other option for Quote Lists is to change the time frame of the search. The default is Use Current Data, it can be changed to a range using the Start/End calendar settings, see Time Frame of Search, below.

Scan Results

Off-line scans can also be made on saved Scan Results lists.

Select Scan Results from the first drop down list, and then select the scan result from the Select Market Scan Result selector dialog box:

mrktscan_srchon_msresults.gif

The list of scan results will be updated depending on the date of data that you select. If you choose the same data date as the date of the original scan, there will be no change to the result.

Pre-computed Lists

Off-line scans can be made of Pre-computed Lists.

First the results of the pre-computed scan that you select in the Search On drop down lists is retrieved from the server. These results lists have been generated and saved on the server. The retrieved lists will next be subjected to the market scan which you are in the process of defining.

mrktscan_srchon_precomptds.gif

As with other search groups, a range of dates for the data used to create the list can be selected for the pre-computed list. Unless a date is specified, the current date’s data will be used by default. See the explanation of how to set the Time Frame of Search, below.

Entire Market

Both Off-line and On-line scans can be set to scan the Entire Market.

Markets are grouped nationally. For example, select United States to search all exchanges in USA. The Market list is populated from the markets that you have selected to receive data from using the Symbols Maintenance Wizard.

mrktscan_srchon_entrmarket.gif

Scanning off-line will give you greater options for search criteria, see the Search Criteria section of this topic, below.

In both cases, you can choose to include the selected markets indices and you can select a specific date range to scan or leave the default, Use Current Data, selected. See Time Frame of Search, in the next section.

Time Frame of Search

The search scope selection panel also includes tools to define the timeframe of the search.

The default is Use Current Data which will return results for symbols that meet the criteria using data from the most recent trading period.

To specify a particular timeframe for the search, un-check this selection, and specify a range of dates using the Start/End calendar settings:

mrktscan_calendarselctor.gif

This setting will return results that meet the scan's criteria during the timeframe specified.

The criteria must be satisfied on a day during the timeframe, but the criteria itself may draw on data from before that period. For example a scan with the criteria "gap up within the past 3 days" on the time frame 14/06/2005 to 30/06/2005 will scan price data for any gaps up in the period 11/06-30/06 (i.e. including 3 days before 14 June), but only return results for symbols that met the criteria on those days in the specified range.

The Data Date column on the Search Results page will indicate the exact date on which the symbol satisfied the criteria.

Type in the date using the dd/mm/YYYY format, or use the convenient drop–down calendar selector tool.

Search Criteria

Search criteria for a scan is defined by a number of expressions that are created by the user and listed in the Criteria Expression area.

Each criteria expression is listed in the Search Criteria Expressions list located in the right side of the Search Criteria work area.

mrktscan_srchcrt_expsnlist.gif

Each scan can have any number of expressions that will act together to define the total criteria that will define the scan results.

The Search Criteria Expressions list has two components for each expression: Selected Criteria and Parameters. The Selected criteria refers to the criteria type, and the parameters include the user defined variables.

There are a number of different criteria types. They are selected from the Search Criteria list on the left side of  the Search Criteria work area.

Each criteria type has different parameters which apply to it. The parameters are set by the user in the Search Criteria Parameters Definition Area located in the lower right side of the Search Criteria work area, directly beneath the Search Criteria Expressions list.

The content and complexity of the parameters dialog settings varies considerably, depending on the criteria type on which it is based.

The process of defining the search criteria expressions is explained fully in the Criteria Overview topic and related topics.

Save Scan Criteria

You can make changes to existing scans and run the scan to see if the criteria you defined and the parameters provide the scan results you are expecting.

If you are satisfied with the results you may want to save the new scan criteria so that you can use it again.

When you are satisfied with the parameters and criteria of the scan, click on the save button butn_save.gif in the function bar or select the Save Search Criteria command in the Action Menu.

The changes you make to the parameters and criteria expressions will not automatically be saved. If you Close Your SOFTWARE or the current scan, without saving the changes, they will be lost.

Note - If you have not made any changes to the existing scan, the Save button will be disabled.

Edit saved Scan Criteria

Once the scan has been created and saved, it can be opened at any time and edited.

The process for editing the scope and criteria expressions is the same as when they were created.

To edit current scan criteria, select a criteria expression and double left mouse-click it to open its parameter definition controls in the Search Criteria Parameters work area. This is the same work page on which the scan was originally created.

Additional criteria expressions can be added during an edit using the Add button. Existing expressions can be deleted using the Remove button.

Note - The only attribute of market scans which cannot be edited is its on-line or off-line character of the scan. This  can only be set at creation.

Once changes have been made during an edit, the function bar's save button butn_save.gif will become active. Click on the Save button butn_save.gif, or select the Action menu's Save Search Criteria command, to save the changes.

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