برای درک بهتر نحوه تغییرات هر اندیکاتور ضروری است. تا نحوه محاسبه آن را بدانیم و مفهوم حرکات آن را درک کنیم. همانطور که می دانید اندیکاتور ها فرمول هایی ریاضی هستند که اطلاعات نمودار قیمت را پردازش می کنند، در ادامه فرمول محاسبه ی اندیکاتور envelope را به صورت ریاضی نمایش می دهیم.

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&#;&#;&#;&#;&#;&#;&#;&#;&#; Envelope &#;&#; &#;&#;&#;&#;&#; &#;&#;&#;&#;&#;&#; &#;&#;&#;&#; &#;&#;&#;&#;&#;&#; &#;&#;&#;&#; &#;&#;&#;&#;&#;&#; &#;&#;&#;&#;&#;&#; &#;&#;&#;&#;&#; &#;&#;&#;&#; &#; &#;&#;&#;&#;&#;&#; &#;&#;&#;&#;&#;&#;‌&#;&#;&#; &#;&#;&#;&#;&#; &#;&#;&#;&#; &#; &#;&#;&#;&#;&#; &#;&#;&#;&#; ( overbought&#;oversold‌  &#;&#; &#;&#;&#;&#;&#;) &#;&#; &#;&#;&#; &#;&#;‌&#;&#;&#;.