commission during backtesting ea ?

 
Hello, please do you know if during backtesting ea are commission already calculated in profit / loss ?
 
If broker uses OrderCommission() field (or MT5 equivalent) then yes.

Do not count on OrderCommission and OrderSwap. Some brokers don't use those fields. (Maybe related to Government required accounting/tax laws.)
          please help: Mt4 commission - Trading Accounts - MQL4 programming forum
          "balance" orders in account history - Day Trading Techniques - MQL4 programming forum

Broker History
FXCM
Commission - <TICKET>
Rollover - <TICKET>

>R/O - 1,000 EUR/USD @0.52

#<ticket>  N/A
OANDA
Balance update
Financing