You can place an order on hold from the Order Book widget. When you place an order on hold, you can change it as you would any other order. A held order remains in the widget until it is resubmitted or deleted. To put on order on hold, click
.

To add the Pause and Resume buttons:
Pausing an algo order puts all off the working child orders into the “Hold” state. Pausing a TT order type order is limited to orders with a status of Waiting, Pending Trigger, or Working.
To pause an algo order, select the parent order and click the Pause button.
Upon selecting a paused order and choosing the resume button
, the held child orders are resubmitted to the market. For slicer order types, if a slice was missed while the parent order was paused, the algorithm will resume by immediately placing the first slice after reactivation.
In the Order Book widget, you can pause and resume TT order types. Before you can pause or resume a TT order type, you must first add the Pause and Resume buttons to the Order Book widget toolbar.
To add the Pause and Resume buttons:
Pausing a TT order puts all of the working child orders in the “Hold” state. Pausing a TT order type order is limited to orders with a status of Waiting, Pending Trigger, or Working.
To pause an algo order, select the parent order and click the Pause button
.
Upon selecting a paused order and choosing the Resume button
, the held child orders are resubmitted to the market. For slicer order types, if a slice was missed while the parent order was paused, the algorithm will resume by immediately placing the first slice after reactivation.