First Bar is crucial when there is gap up or gap down opening. It is recommended to use 15m Timeframe for better use.
Crossing this range signifies the absorption of existing buyers/sellers in the opening session and sometimes decide the trend onwards.
Utility functions for session specific information like the bar index of the session.
inSession(spec) Returns true if the current bar is in the session specification.
spec : session.regular (default), session.extended or other time spec.
Returns: True if the current is in session; otherwise false.