In virtual currency futures trading, the timing of opening and closing positions is crucial. Understanding and mastering the concepts of opening, closing, liquidation, and rollover, as well as risk management, can help traders avoid common pitfalls. Successful trading requires making judgments based on market trends, fundamental signals, and technical indicators. When closing a position, principles such as profit-taking, stop-loss, and fundamental changes should be followed. Open interest is an important indicator that reflects market sentiment. Choosing appropriate leverage and exercising caution when rolling over positions are also key to increasing trading success rates.