Here is a list of available metrics:
Clicks
Conversions
Conversions (1 Day)
Conversions (7 Days)
Conversions (14 Days)
Conversions (30 Days)
Cost
Impressions
Sales
Sales (1 Day)
Sales (7 Days)
Sales (14 Days)
Sales (30 Days)
Units Ordered (1 Day)
Units Ordered (7 Days)
Units Ordered (14 Days)
Units Ordered (30 Days)