{"id":54151,"date":"2025-05-14T13:16:23","date_gmt":"2025-05-14T05:16:23","guid":{"rendered":"http:\/\/test.swqi.tw\/?p=54151"},"modified":"2025-12-03T03:43:00","modified_gmt":"2025-12-02T19:43:00","slug":"forex-bollinger-bands-guide","status":"publish","type":"post","link":"https:\/\/mister.forex\/vi\/forex-bollinger-bands-guide\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn Bollinger Bands: Ng\u01b0\u1eddi m\u1edbi hi\u1ec3u bi\u1ebfn \u0111\u1ed9ng, gi\u1ea3i m\u00e3 ch\u00ednh x\u00e1c t\u00edn hi\u1ec7u d\u1ea3i tr\u00ean v\u00e0 d\u1ea3i d\u01b0\u1edbi"},"content":{"rendered":"
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Ch\u1ec9 s\u1ed1 k\u1ef9 thu\u1eadt Forex: C\u00e1ch s\u1eed d\u1ee5ng v\u00e0 gi\u1ea3i th\u00edch Bollinger Bands (D\u1ea3i Bollinger)<\/strong> <\/h2>\n\nSau Moving Average (MA), Ch\u1ec9 s\u1ed1 s\u1ee9c m\u1ea1nh t\u01b0\u01a1ng \u0111\u1ed1i (RSI) v\u00e0 MACD, \"Bollinger Bands\"<\/strong> l\u00e0 m\u1ed9t ch\u1ec9 s\u1ed1 k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn m\u00e0 b\u1ea1n r\u1ea5t c\u00f3 th\u1ec3 th\u1ea5y tr\u00ean bi\u1ec3u \u0111\u1ed3 c\u1ee7a nhi\u1ec1u nh\u00e0 giao d\u1ecbch.
\nN\u00f3 \u0111\u01b0\u1ee3c ph\u00e1t minh b\u1edfi John Bollinger<\/strong> v\u00e0o nh\u1eefng n\u0103m 1980, tr\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ed9t \"k\u00eanh\" \u0111\u1ed9ng \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh xung quanh bi\u1ec3u \u0111\u1ed3 gi\u00e1.

\nCh\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a Bollinger Bands l\u00e0 gi\u00fap nh\u00e0 giao d\u1ecbch \u0111o l\u01b0\u1eddng \u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng c\u1ee7a th\u1ecb tr\u01b0\u1eddng v\u00e0 \u0111\u00e1nh gi\u00e1 v\u1ecb tr\u00ed gi\u00e1 hi\u1ec7n t\u1ea1i so v\u1edbi m\u1ee9c trung b\u00ecnh g\u1ea7n \u0111\u00e2y l\u00e0 cao hay th\u1ea5p.
\nHi\u1ec3u c\u1ea5u t\u1ea1o v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn c\u1ee7a Bollinger Bands s\u1ebd b\u1ed5 sung m\u1ed9t c\u00f4ng c\u1ee5 h\u1eefu \u00edch cho b\u1ed9 c\u00f4ng c\u1ee5 ph\u00e2n t\u00edch k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea1n.
\nB\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u1edbi thi\u1ec7u \u0111\u01a1n gi\u1ea3n v\u1ec1 ba \u0111\u01b0\u1eddng c\u1ee7a Bollinger Bands l\u00e0 g\u00ec, c\u00e1ch quan s\u00e1t bi\u1ebfn \u0111\u1ed9ng th\u1ecb tr\u01b0\u1eddng qua n\u00f3, v\u00e0 nh\u1eefng \u0111i\u1ec3m c\u1ea7n l\u01b0u \u00fd khi s\u1eed d\u1ee5ng.

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1. Ba \u0111\u01b0\u1eddng c\u1ee7a Bollinger Bands: \u0110\u01b0\u1eddng gi\u1eefa, \u0111\u01b0\u1eddng tr\u00ean v\u00e0 \u0111\u01b0\u1eddng d\u01b0\u1edbi<\/strong> <\/h2>\nBollinger Bands bao g\u1ed3m ba \u0111\u01b0\u1eddng t\u1ea1o th\u00e0nh m\u1ed9t k\u00eanh bao quanh bi\u1ebfn \u0111\u1ed9ng gi\u00e1: 

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  • \u0110\u01b0\u1eddng gi\u1eefa \/ \u0110\u01b0\u1eddng trung t\u00e2m (Middle Band):<\/strong> \u0110\u00e2y th\u1ef1c ch\u1ea5t l\u00e0 m\u1ed9t Simple Moving Average (SMA)<\/strong>. Chu k\u1ef3 ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 20 k\u1ef3. N\u00f3 \u0111\u1ea1i di\u1ec7n cho chi ph\u00ed trung b\u00ecnh ho\u1eb7c trung t\u00e2m xu h\u01b0\u1edbng c\u1ee7a gi\u00e1 trong m\u1ed9t kho\u1ea3ng th\u1eddi gian g\u1ea7n \u0111\u00e2y.<\/li>\n
  • \u0110\u01b0\u1eddng tr\u00ean (Upper Band):<\/strong> \u0110\u01b0\u1ee3c t\u00ednh b\u1eb1ng gi\u00e1 tr\u1ecb c\u1ee7a \u0111\u01b0\u1eddng gi\u1eefa (SMA) c\u1ed9ng v\u1edbi m\u1ed9t b\u1ed9i s\u1ed1 c\u1ee7a Standard Deviation (\u0111\u1ed9 l\u1ec7ch chu\u1ea9n)<\/strong>.<\/li>\n
  • \u0110\u01b0\u1eddng d\u01b0\u1edbi (Lower Band):<\/strong> \u0110\u01b0\u1ee3c t\u00ednh b\u1eb1ng gi\u00e1 tr\u1ecb c\u1ee7a \u0111\u01b0\u1eddng gi\u1eefa (SMA) tr\u1eeb \u0111i c\u00f9ng m\u1ed9t b\u1ed9i s\u1ed1 c\u1ee7a \u0111\u1ed9 l\u1ec7ch chu\u1ea9n.<\/li>\n<\/ul>\n
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    \n\n\u0110\u1ed9 l\u1ec7ch chu\u1ea9n l\u00e0 g\u00ec? (Hi\u1ec3u \u0111\u01a1n gi\u1ea3n)<\/strong> 
    \nB\u1ea1n kh\u00f4ng c\u1ea7n nghi\u00ean c\u1ee9u s\u00e2u c\u00e1c c\u00f4ng th\u1ee9c to\u00e1n h\u1ecdc ph\u1ee9c t\u1ea1p.
    \nCh\u1ec9 c\u1ea7n bi\u1ebft, \u0111\u1ed9 l\u1ec7ch chu\u1ea9n<\/strong> l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p \u0111o m\u1ee9c \u0111\u1ed9 ph\u00e2n t\u00e1n c\u1ee7a d\u1eef li\u1ec7u.
    \n\u1ede \u0111\u00e2y, n\u00f3 \u0111o m\u1ee9c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng c\u1ee7a gi\u00e1 trong m\u1ed9t kho\u1ea3ng th\u1eddi gian tr\u01b0\u1edbc \u0111\u00f3 (c\u00f9ng chu k\u1ef3 v\u1edbi SMA \u0111\u01b0\u1eddng gi\u1eefa, th\u01b0\u1eddng l\u00e0 20 k\u1ef3) so v\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh (SMA \u0111\u01b0\u1eddng gi\u1eefa).

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    • Bi\u1ebfn \u0111\u1ed9ng gi\u00e1 m\u1ea1nh (\u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng cao) -> gi\u00e1 tr\u1ecb \u0111\u1ed9 l\u1ec7ch chu\u1ea9n t\u0103ng l\u00ean.<\/li>\n
    • Bi\u1ebfn \u0111\u1ed9ng gi\u00e1 nh\u1eb9 (\u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng th\u1ea5p) -> gi\u00e1 tr\u1ecb \u0111\u1ed9 l\u1ec7ch chu\u1ea9n gi\u1ea3m xu\u1ed1ng.<\/li>\n<\/ul>\n
      \n\u0110\u01b0\u1eddng tr\u00ean v\u00e0 \u0111\u01b0\u1eddng d\u01b0\u1edbi th\u01b0\u1eddng \u0111\u01b0\u1ee3c v\u1ebd b\u1eb1ng c\u00e1ch l\u1ea5y \u0111\u01b0\u1eddng gi\u1eefa c\u1ed9ng\/tr\u1eeb 2 l\u1ea7n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n.

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      2. \u0110\u1ed9 r\u1ed9ng k\u00eanh: \"Ch\u1ec9 s\u1ed1 th\u1eddi ti\u1ebft\" c\u1ee7a bi\u1ebfn \u0111\u1ed9ng th\u1ecb tr\u01b0\u1eddng<\/strong> <\/h2>\nM\u1ed9t trong nh\u1eefng ch\u1ee9c n\u0103ng tr\u1ef1c quan v\u00e0 h\u1eefu \u00edch nh\u1ea5t c\u1ee7a Bollinger Bands l\u00e0 quan s\u00e1t kho\u1ea3ng c\u00e1ch gi\u1eefa \u0111\u01b0\u1eddng tr\u00ean v\u00e0 \u0111\u01b0\u1eddng d\u01b0\u1edbi (\u0111\u1ed9 r\u1ed9ng k\u00eanh) \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng c\u1ee7a th\u1ecb tr\u01b0\u1eddng: 

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