{"id":1908,"date":"2022-07-05T07:09:00","date_gmt":"2022-07-05T07:09:00","guid":{"rendered":"https:\/\/www.overcharts.com\/en\/helpcenter\/?post_type=docs&p=1908"},"modified":"2022-08-19T08:22:26","modified_gmt":"2022-08-19T08:22:26","password":"","slug":"overbasic-property","status":"publish","type":"docs","link":"https:\/\/www.overcharts.com\/en\/helpcenter\/docs\/overbasic-property\/","title":{"rendered":"Overbasic – Property"},"content":{"rendered":"\n

A PROPERTY is an input parameter that can be set by the user outside the script to influence the calculation within the script. It is possible to set the Property value in the Indicator \/ Trading-System configuration window.<\/p>\n\n\n\n

There is no limit on the number of Properties that can be defined in a script. However, we recommend you define only the strictly necessary properties in order not to complicate the configuration unnecessarily.<\/p><\/blockquote>\n\n\n\n

<\/div>\n\n\n\n

Syntax<\/strong><\/h3>\n\n\n\n
Property<\/strong><\/mark> <name> As<\/mark><\/strong> <data type>\n    <attributes>\nEndProperty<\/mark><\/strong><\/code><\/pre>\n\n\n\n
<\/div>\n\n\n\n
A property begins with Property<\/em><\/strong> keyword and ends with EndProperty<\/em><\/strong> keyword.
In the first line of property, immediately after Property<\/strong> keyword, the property name<\/strong> is defined.
After the property name, in the same line, <data type<\/strong>> is defined.<\/p>\n\n\n\n
A property can be Numeric<\/em>, Date<\/em>, Time<\/em>, Database<\/em>, Indicator<\/em> (see data types documentation<\/a><\/strong>).<\/p>\n\n\n\n
Inside the Property<\/em> and EndProperty<\/em> keywords you can define the following attributes:<\/p>\n\n\n\n
INFO<\/strong>: allows you to specify the property description. Description is displayed for example in the Indicator \/ Trading-System configuration window.<\/p>\n\n\n\n
Info<\/mark><\/strong> \"<description>\"<\/code><\/pre>\n\n\n\n
<\/div>\n\n\n\n
LIST<\/strong>: allows you to define a list of values for the property. Each LIST attribute corresponds to a list item. Property will appear in the configuration window as a combo-box. This attribute is NOT usable in conjunction with RANGE attribute.<\/em><\/p>\n\n\n\n
List<\/mark><\/strong> (\"<item name>\", <value>)<\/code><\/pre>\n\n\n\n
<\/div>\n\n\n\n
RANGE<\/strong>: allows you to define the property validity range. This attribute is NOT usable in conjunction with LIST attribute..<\/em><\/p>\n\n\n\n
Range<\/mark><\/strong> (<minimum value>, <maximum value>)<\/code><\/pre>\n\n\n\n
<\/div>\n\n\n\n
DEFAULT<\/strong>: allows you to define the property default value.<\/p>\n\n\n\n
Default<\/mark><\/strong> (<value>)<\/code><\/pre>\n\n\n\n
<\/div>\n\n\n\n
Attributes you can use in a property depend on the property data type:<\/p>\n\n\n\n
  • In Numeric<\/em><\/strong>, Date<\/em><\/strong> and Time<\/strong><\/em> properties you can use INFO, LIST (or RANGE), and DEFAULT attributes.<\/li>
  • In Database<\/em><\/strong> and Indicator<\/strong><\/em>  properties (representing a data series) you can only use INFO attribute.<\/li><\/ul>\n\n\n\n
    <\/div>\n\n\n\n
    Properties must be defined at script level, that is, externally to all functions. We recommend you define all properties at the beginning of the script.<\/p>\n\n\n\n
    <\/div>\n\n\n\n
    Examples<\/strong>:<\/p>\n\n\n\n
    'Property will appear in the configuration window as a text box.<\/mark>\nProperty<\/mark><\/strong> Period As Numeric<\/mark><\/strong>\n    Info<\/strong><\/mark> \"Calculation period\"\n    Range<\/mark><\/strong> (5, 1000)\n    Default<\/strong><\/mark> (21)\nEndProperty<\/strong><\/mark>\n\n'Property will appear in the configuration window as a combo-box.<\/mark>\nProperty<\/mark><\/strong> Period As Numeric<\/mark><\/strong>\n    Info<\/strong><\/mark> \"Calculation period\"\n    List<\/strong><\/mark><\/strong><\/mark> (\"Low\", 20)\n    List<\/strong><\/mark><\/strong><\/mark> (\"Middle\", 50)\n    List<\/strong><\/mark><\/strong><\/mark> (\"High\", 100)\n    Default<\/strong><\/mark> (20)\nEndProperty<\/strong><\/mark>\n\n'Property represents the data series of an indicator or the Open \/ High \/ Low \/ Close data series of the underlying instrument.<\/mark>\nProperty<\/strong><\/mark> Reference As Indicator<\/strong><\/mark><\/strong><\/mark>\n    Info<\/strong><\/mark> \"Reference Indicator\"\nEndProperty<\/strong><\/mark>\n\n'Property represents an instrument.<\/mark>\nProperty<\/mark><\/strong> DB As Database<\/strong><\/mark><\/strong><\/mark>\n    Info<\/strong><\/mark> \"Reference instrument\"\nEndProperty<\/strong><\/mark><\/code><\/pre>\n\n\n\n
    <\/div>\n\n\n\n
    An Indicator<\/em><\/strong> property is particularly useful if you want to build an indicator on indicator. Using this property within the script you will be able to access the data series of an external indicator and use it to calculate, for example, its moving average or for any other type of calculation.<\/p>\n\n\n\n
    <\/div>\n\n\n\n
    Usage<\/strong><\/h3>\n\n\n\n
    Property value is accessible within the script using its name, just like any variable. The only difference is that a Property is read only, that is, you cannot change its value within the script.<\/p>\n\n\n\n
    Property<\/mark><\/strong> Period As Numeric<\/mark><\/strong>\n    Info<\/strong><\/mark> \"Calculation period\"\n    Range<\/mark><\/strong> (5, 1000)\n    Default<\/strong><\/mark> (21)\nEndProperty<\/strong><\/mark>\n\nFunction Main<\/strong><\/mark>()\n    Dim<\/mark><\/strong> Total As Numeric<\/mark><\/strong> = 0\n\n    Dim<\/mark><\/strong> i As Numeric<\/mark><\/strong> = 0\n    'Period property is used in the calculation as a 'read-only' variable.<\/mark>\n    For<\/mark><\/strong> i = 0 To<\/strong><\/mark> Period - 1\n        Total = Total + Close(-i)\n    Next<\/mark><\/strong> i\n\n    Return<\/mark><\/strong> Total \/ Period\nEndFunction<\/mark><\/strong><\/code><\/pre>\n\n\n\n
    <\/div>\n","protected":false},"excerpt":{"rendered":"
    A PROPERTY is an input parameter that can be set by the user outside the script to influence the calculation within the script. It is possible to set the Property value in the Indicator \/ Trading-System configuration window. There is no limit on the number of Properties that can be defined in a script. However, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"doc_category":[16],"doc_tag":[],"class_list":["post-1908","docs","type-docs","status-publish","hentry","doc_category-syntax-keywords"],"year_month":"2026-10","word_count":547,"total_views":"2","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"Overcharts Team","author_nicename":"overadmin","author_url":"https:\/\/www.overcharts.com\/en\/helpcenter\/author\/overadmin\/"},"doc_category_info":[{"term_name":"Syntax & Keywords","term_url":"https:\/\/www.overcharts.com\/en\/helpcenter\/docs-category\/syntax-keywords\/"}],"doc_tag_info":[],"yoast_head":"\r\nOverbasic - Property - Overcharts Help Center<\/title>\r\n<meta name=\"description\" content=\"A PROPERTY is an input parameter that can be set by the user outside the script to influence the calculation within the script.\" \/>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/www.overcharts.com\/en\/helpcenter\/docs\/overbasic-property\/\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"Overbasic - 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