InstrumentSessionState

• Name	Description
  Auction	Participants place orders to buy or sell units at certain buying or selling prices. Orders collected during an auction are matched to form a contract
  AutomatedTrading	Normal trading
  Break	Break in instrument opening hours
  CallAuctionTrading	Participants place orders to buy or sell units at certain buying or selling prices. Orders collected during an auction are matched to form a contract
  Closed	Closed for trading
  Halt	Trading is halted for an instrument
  OpeningAuction	Opening auction exchange state
  PitTrading	Transactions are conducted in trading pits on the floor of the Exchange
  PostAutomatedTrading	Legacy trade state. It will be decommissioned and should not be used
  PostMarket	Extended trading session after the regular trading session. Specify the orders ExecuteAtTradingSession field to trade in this session
  PostTrading	The exchange is accepting orders which will be traded in the OpeningAuction or AutomatedTrading session of the following day
  PreAutomatedTrading	Legacy trade state. It will be decommissioned and should not be used
  PreMarket	Extended trading session before the regular trading session. Specify the orders ExecuteAtTradingSession field to trade in this session
  PreTrading
  Suspended	Trading is suspended for an instrument
  TradingAtLast	Orders collected at last price in absence of closing auction price
  Undefined	The state of the Exchange is unknown