NinjaTrader supports multiple connectivity providers and therefore manages a single instrument instance (master instrument) which maintains the parameters required to establish market data and order permissions through the various connectivity sources. The Instrument Manager manages the instrument lists, edits instrument data and can add or remove instruments from the database. A default database of commonly traded instruments is installed with NinjaTrader. The Instrument Manager can be accessed by left mouse clicking on the Tools menu within the  NinjaTrader Control Center and selecting the menu item Instrument Manager.