What should I do if a trading app freezes during an open position?

You try switching to an alternate access point first, the broker’s web terminal through a browser, or a different device if available, since the underlying account and positions are the same regardless of which interface you access them through. If neither app nor web terminal is responsive, most brokers have a dedicated phone-based dealing desk specifically for emergency order placement or square-off, and you call that number directly rather than continuing to retry a frozen app, since repeated taps on an unresponsive screen can sometimes queue up duplicate orders once connectivity restores. You avoid restarting your device or force-closing the app repeatedly in rapid succession if you have an open, time-sensitive position, since that risks losing visibility into the position’s status right when you need it most. Once you’re able to access your account again, you immediately check the order book and positions to confirm nothing unexpected happened (like a duplicate order or an unintended fill) during the freeze.