Many traders use long and short positions simultaneously for risk control, but do you know? This strategy is far more than just basic usage; combined with other methods, it can produce unexpected results. Today, let's discuss several practical advanced combinations that are truly useful, involving technical analysis, capital management, and psychological aspects.

**Long and Short Dual Opening + Trend Following, Suitable for All Market Conditions**

Simply opening both long and short positions performs moderately in ranging markets, but what should you do once the market breaks out of consolidation and starts trending? It's simple—close the opposite position and increase the position in the direction of the trend. In actual operation, you can use the 50-day moving average as a filter. When the price rises above the moving average, increase long positions; when it falls below, switch to increasing short positions. This approach maintains the hedging property while not missing the main trend.

**Inter-Contract Arbitrage, Profiting from Contract Time Differences**

This is an advanced form of long and short dual opening. For example, you simultaneously trade near-month and far-month contracts of a certain cryptocurrency, taking advantage of the price difference between the two months. When the spread widens abnormally, buy the undervalued contract and sell the overvalued one, then close the position when the spread converges. This method has relatively controllable risk and is suitable for traders with futures experience.

Cross-asset arbitrage is also worth exploring—the price differences between different coins or across different exchanges are all potential opportunities.