Cup: The cup should be "u" shaped and resemble a bowl or rounding bottom. A "v" shaped bottom would be considered too sharp of a reversal to qualify.
要点二：u型是重要的形态标志，看起来像个碗，一般认为V型则反转太剧烈了，。
The categories rounding out the bottom 20 are for the most part expendable.
销量最不好的20类产品是相对大宗的消费品。
The categories rounding out the bottom 20 are for the most part expendable.
销量最不好的20类产品是相对大宗的消费品。
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