a few things you will have to keep in mind here in case you are trading options through bracket order.
the charges vary broker to broker.
in case you trade through zerodha , and you trade multiple lots. they will charge you brokerage fee for each of the effected trade, for eg., you place an order for 5 lots.. if it is executed as 3 trades of 2 +2+1. you will be billed for 3 orders i.e 60 rs buying and 60 rs selling . if it is executed in 5 tranches it will become 100+ 100. so be careful and always check the charges before with your broker.