1.要点，需要把下载下来的数据，日期栏的单元格的格式都改为常规。
2.highlow，竹节图：
3.candle,k形图
老师说日期要提前一天，但这里我没提前，貌似也没有问题，而她提前了的，好像也是对的，我也没有进一步深究。但我看函数说明，按道理没有提前的必要啊。要不问一下？
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