Cancel all open orders
Cancel open pulls every open order at the broker in one action: WORKING and PARTIAL alike, across both your paper and live accounts. It stops orders that haven’t executed yet; shares you already hold are untouched.
The confirm
A confirmation window asks you to confirm before any orders are pulled (or ⌘⇧X opens the same confirm). After it runs, a toast shows how many open orders were cancelled. Each cancelled order lands in the Orders table with a USER reason, and a confirmation goes out across your enabled notification channels.
Partially-filled orders
Cancelling a PARTIAL keeps what already filled (those shares are a position now) and cancels the unfilled remainder, exactly how the broker itself treats a cancelled partial.
Pairs well with Pause
Cancel open without Pause leaves auto-execute free to submit new orders on the next run. When the goal is “nothing in flight and nothing new”, hit Pause first, then Cancel open.