Do liquidation trades executed by IBKR count as day trades?

概観: 

Yes, if a position that is opened is subsequently closed in the same trading session (day), it is defined as a Pattern Day Trade. If an IBKR liquidation results in the closing of a position that was opened in that same session/day, it would be counted towards the Pattern Day Trade total. This could also result in the account being flagged as a Pattern Day Trade account.