HistoricalSession

Field	Type	Description
`startDateTime`	`string`	The datetime when the request should be submitted. Formatted as “YYYYMMDD-HH:mm:ss” to assume UTC or “YYYYMMDD HH:mm:ss TMZ”
`endDateTime`	`string`	The request’s end date and time. This should be formatted as “YYYYMMDD HH:mm:ss TMZ” or an empty string indicates current present moment.
`refDate`	`string`	Reference date for the bar.