A bracket is a take profit and a stop loss attached to your open position.
The take profit closes the trade if the price reaches your target.
The stop loss closes it if the price moves against you to a level you set.
Together they protect the position on both sides without you watching every tick.
Why bother
Deciding where to get out before you are in a trade is easier than deciding while money is moving. A bracket makes that decision once, at the calmest moment, and then carries it out whether or not you are watching.
On a prop account this matters more than usual, because an unattended losing position is the fastest route to a daily loss breach.
One bracket for the whole position
Brackets here are managed at the position level. You have one take profit and one stop loss for the whole position, always sized to exactly what you hold. You do not manage a separate bracket per fill.
They resize themselves
Add contracts and the bracket grows to cover the larger size.
Close part of it and the bracket shrinks to match.
Close everything and the bracket clears. Once you are flat, nothing is left hanging.
This is worth knowing because on some platforms a partially closed position leaves brackets at the wrong size. Here they stay matched to what you actually hold.
Attaching one
You can attach a take profit or stop loss to any open position from the chart, including one you opened with a market order. Drag the line to where you want it. While dragging you see a live preview of the projected profit or loss, and it is placed as soon as you let go.
Dragging is reliable
Release a line and it updates instantly to where you dropped it. If that price is not allowed, for example because it would trigger immediately or the account is locked, the line snaps cleanly back to where it was. You are never left unsure where your bracket actually sits.
Protection up front
Place a stop on the wrong side of the price, one that would trigger the instant it exists, and Hyperprop rejects it with a clear message rather than letting it fill. Market orders respect the brackets you have set, so they actually get placed.