Below you can find the list of possible smart values for SLA:
{{sla.breached}}
{{sla.remainingTimeInPercent}}
{{sla.remainingTime}}
{{sla.spentTime}}
{{sla.spentTimeInPercent}}
{{sla.state}}
{{sla.deadline}}
{{sla.negotiatedStartDate}}
{{sla.negotiatedEndDate}}
{{sla.timeOnHold}}
{{sla.timeOnHoldInPercent}}
{{sla.timeActive}}
{{sla.timeActiveInPercent}}
{{sla.timeInGoal}}