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NAQ Professional Data Feed API (Level I and Level II)

WatchL2

Use this method to subscribe to a symbol for real time Level II market data updates. To unsubscribe from a symbol after subscribing to it, call the RemoveL2 method. To subscribe to a Level I symbol, see Watch.

 

NAQ1.WatchL2(BSTR Symbol)

 

Remarks

This method initiates the subscription of a real time Level II symbol watch. This method should not be called until at least one second after the Login method has been called. If the subscription was successful, the following events will fire throughout the trading session.

ProcessL2NASDAQRecap Level II NASDAQ recap message.
ProcessL2NASDAQUpdate Level II NASDAQ update message.
ProcessL2CanadianRecap Level II Canadian recap message.
ProcessL2CanadianUpdate Level II Canadian update message.
ProcessL2CanadianSale Level II Canadian sale message.
ProcessL2CanadianCancel Level II Canadian cancel message.
Level2Reset Level II reset message.

 

 

 

See Also 

    RemoveL2, Watch, Remove