The first date to include in a data import
m/d/y - literal start-date constant (or d/m/y if that date format option is selected)
Earliest - 1/1/1990 or the oldest available date, which ever is more recent
To start an import with a date earlier than 1/1/1990, use the desired date rather than Earliest. (The actual earliest data date can't be known until the import is completed.)
See Date Constants for date formatting options.
See also EndDate and NumBars.