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移動平均線的計算方式

MA 把最近 N 天的收盤價取平均,用來平滑短期波動。

簡單移動平均(SMA)

N 日均線就是最近 N 個交易日收盤價的算術平均。例如 5 日均線,每天都用最近 5 天的收盤價相加再除以 5;隔天最舊的一天退出、最新的一天加入,所以叫「移動」。

常見週期

其他種類

注意事項

均線是落後指標:它描述已經發生的價格,不預測未來。前 N − 1 天資料不足,所以沒有值。計算均線請使用還原價,否則除權息會造成假的斷點。

本文只說明計算方式,不構成投資建議。

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