Source:
https://www.interactivebrokers.com/en/?f=%2Fen%2Ftrading%2Forders%2Fbracket.php
Bracket Orders are often structured as a 'One Cancels the Other' order - see
OCO
See also:
https://www.davemanuel.com/investor-dictionary/bracket-order/
https://www.trademonster.com/WebHelp/Topics/Main/Bracket_Orders/Bracket_Orders.htm
https://www.investopedia.com/terms/b/bracketedsellorder.asp