技术分析用语。指原本向上呈多头排列的短、中、长期平均线，其短期平均线自上方逐渐走平且向下斜插（跌破）中、长期平均线，并带动中、长期平均线同步向下行成空头排列。这种情况意味着上升趋势被扭转，未来方向看跌。

A crossover resulting from a security's long-term moving average breaking above its short-term moving average or support level.

As long-term indicators carry more weight, this trend indicates a bear market on the horizon and is reinforced by high trading volumes. Additionally, the long-term moving average becomes the new resistance level in the rising market.