> For the complete documentation index, see [llms.txt](https://developer.barchart.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.barchart.com/market-replay-docs/api-query-types/tick-queries/tick-query-parameters.md).
# Tick Query Parameters
| Name | Description |
| ------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| username\* | This parameter should be set to the user name provided by ddfplus to the user account. |
| password\* | This parameter should be set to the password provided by ddfplus for the user name passed in parameter username. |
| symbol\* | This parameter should be set to the symbol for which the query should return data. This query supports the '\*' notation for futures (i.e. RS\*1, where RS is the root symbol for the commodity). Note that a SYMBOL field containing the active contract for which data is returned will be prepended to each record in the result set when using the '\*' notation. |
| start | This parameter should be set to the desired start date/time for the query (the result set will include records back to, and including, this value). If not set, the value will default to the beginning of the day specified in the end parameter, if end is specified, or to the beginning of the current day, if end is not specified. The value should conform to the format yyyymmdd\[hhmm\[ss]], where fields in brackets are optional. Any optional fields that are not explicitly set will default to 0 (i.e. 20090203 will default to 20090203000000 or February 3, 2009 at 00:00:00). |
| end | This parameter should be set to the desired end date/time for the query (the result set will include records up to, but not including, this value). If not set, the value will default to the end of the day specified in the start parameter, if specified, or to the end of the current day, if start is not specified. The value should conform to the format yyyymmdd\[hhmm\[ss]], where fields in brackets are optional. Any optional fields that are not explicitly set will default to 0 (i.e. 20090203 will default to 20090203000000 or February 3, 2009 at 00:00:00). |
| maxrecords | This parameter should be set to the maximum number of records desired. If not specified, there number of records returned will be determined by the date/time parameters specified as well as any defaults that apply to the query. |
| order | This parameter can be set to one of two values (asc and desc) in order to specify the chronological order of the result set returned. If this parameter is not specified, the order results is not guaranteed. |
| sessionfilter | This parameter modifies the default session codes/sale conditions used to return ticks for each exchange. For NYSE and AMEX, the default session filter is "@EFKX56V9" (meaning all ticks with sale conditions corresponding to one of the characters in the filter are included in the results), for NASDAQ the default is "@ABDEFKOSXY156", and for everything else all session codes/sale conditions are returned except the settle (session code '\*'). If the session filter is set to a string of valid session codes (i.e. "EFK"), only ticks with the specified session codes are included in the results. If the string is prefixed with character '!' (i.e."!EFK"), all session codes except those in the string are included in the results. If the string is prefixed with character '+' (i.e. "+T"), then all the default session codes in addition to the ones specified in the string are included in the results. And if the string is prefixed with character '-' (i.e. "-EF") then all default session codes except the ones specified are included in the results. Please note that the '+' character should be escaped (to %2B) when entering the URL in a web browser or executing the query in an API that does not escape it by default. |
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