Low altitude, also known as selling stop loss, breaks through empty orders. When the market is expected to break through a lower support level and there is still room for decline, we will hang low (break through empty orders);

High altitude, also known as selling price limit, is a price limit order. When the market is running at a high level and there is a strong resistance position above, you can hang a high-altitude list or enter the market directly at high altitude;

Low and many, also known as buying restrictions, restrict multiple orders. When the market is running at a low level and there is strong support below, we can hang low and many orders, or directly enter the market at a low level;

High, also known as buying only, breaks through multiple orders. When the market is expected to break through a certain upper resistance position and there is still room for growth, we will hang high (break through multiple orders).