The characteristics of the straw cutter are that a big yinxian line completely covers the short-term moving average (5-day moving average), the medium-term moving average (10 moving average) and the long-term moving average (30-day moving average).

The form of decapitated hay cutter is a big yinxian line that completely covers the short-term moving average (5-day moving average), the medium-term moving average (10 moving average) and the long-term moving average (30-day moving average). The hay cutter shape of the moving average mostly appears at the top of the price or stage, which is a typical short signal of peaking. With the different falling depth, the length of the falling process is also different, thus forming short, medium and long-term head characteristics. Generally, it is a practical K-line with the daily level of spot crude oil. As long as the market rebounds, it can be decisively short.