A bracket order is a combination of a Stop Loss order to reduce your loss and a book profit order to take profits. This is placed along with the main order in the same order form.
For example: You want to buy stock at Rs.100 and to reduce loss want place stop loss order Rs. 2 below LTP and want to book profit @ Rs.104. To do so you can place a buy order at Rs.100 with a spread of Rs.2 and book profit as 104.
On scrips where Bracket Order is available on Dhan, the same will be available in the selection for Intraday Trading.
Note - The Stop Loss Range has to be 0.25% or Rs. 050 Paise (Whichever is higher) for Equity Stocks and Future, For Index Future 0.2%.