You can watch your trades and wait for the best time to close them, but you don’t need to. Instead, you can add orders to close them automatically if certain conditions are met. These orders help you manage risk if the market moves suddenly against you.
Trades, including limit orders such as stop-losses and take-profits, are executed at current market rates when liquidity is available. In a fast moving market, there may be a gap between the current market rate and the rate you set for your stop-loss or take-profit. If your stop-loss is triggered when trading resumes on Sunday, the current market rate may be lower than your stop-loss rate -- resulting in additional losses.