This condition will check to see if a Stored Value name for a selection, market or event has or has NOT been set with a value (of any number). Note: When a stored value is cleared, it is then considered to be NOT set.
For example, using the settings below, before this rule can trigger a Stored Value with the name "recent_volume" for the 'Event' needs to have already been set by another rule at a earlier time; until the Stored Value is set, this rule will not trigger.
Note: One example use for this condition is when deciding to initialise a stored value. i.e. You would run a rule to set it with an initial value when this condition determines that it is not currently set with a value.
