Bottom line: During CME weekend maintenance windows, protective orders (such as stop-loss and take-profit orders) do not simply fail. However, they cannot be triggered while the window lasts.
This is not the same as saying your orders are always active. Your orders and stop-loss/take-profit instructions are still in the system. Trading pauses during the maintenance window (every Sunday from 22:00 to 23:00 UTC, which is Monday 6:00–7:00 a.m. Beijing time), and no orders can be executed during that time. After maintenance ends and the market reopens, order monitoring resumes.
Risk warning: This window is only 60 minutes, but the hidden risk is that Bitcoin spot trading still runs 24/7 during that time. Prices may continue moving during the maintenance period. When CME reopens, the price may have gapped through your stop-loss level. That can cause your stop-loss order to be filled at a far worse price than expected. This has nothing to do with whether your computer is on. It is caused by the server-side execution logic of futures trading.
Futures trading software has a weak point: stop-loss orders are usually monitored by client software or a futures broker's server, not directly by the exchange server. During a market close or maintenance period, those monitoring systems stop. When the market reopens, if the price has already gapped past your stop-loss level, the stop order will be filled at the first available price after the open, not at the price you originally set.
After CME moved to 24/7 trading, this risk did not disappear. The pause simply shrank from two days to one hour. Even in a short window, the price can move enough to create a gap when trading resumes.
What to do next: Before each Sunday maintenance window (after 21:00 UTC), check whether your stop-loss orders are set too close to the current price. If the price is near your stop level, consider closing your position before the maintenance window to avoid being forced out at a bad price. In the first 15–30 minutes after the market reopens on Monday, liquidity may not have fully recovered, so execution prices may still be off from the market price.
