{"id":46302,"date":"2025-01-10T21:46:14","date_gmt":"2025-01-10T13:46:14","guid":{"rendered":"http:\/\/test.swqi.tw\/?p=46302"},"modified":"2025-12-03T03:47:15","modified_gmt":"2025-12-02T19:47:15","slug":"overfitting","status":"publish","type":"post","link":"https:\/\/mister.forex\/vi\/overfitting\/","title":{"rendered":"C\u00e1i g\u00ec l\u00e0 qu\u00e1 m\u1ee9c m\u00f4 ph\u1ecfng? C\u1ea1m b\u1eaby v\u00f4 h\u00ecnh trong giao d\u1ecbch k\u00fd qu\u1ef9 ngo\u1ea1i h\u1ed1i."},"content":{"rendered":"
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\n\nTrong giao d\u1ecbch k\u00fd qu\u1ef9 ngo\u1ea1i h\u1ed1i, ph\u00e2n t\u00edch d\u1eef li\u1ec7u v\u00e0 d\u1ef1 \u0111o\u00e1n m\u00f4 h\u00ecnh l\u00e0 c\u1ed1t l\u00f5i \u0111\u1ec3 x\u00e2y d\u1ef1ng chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch th\u00e0nh c\u00f4ng. Nh\u01b0ng n\u1ebfu trong qu\u00e1 tr\u00ecnh n\u00e0y kh\u00f4ng n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng th\u00edch h\u1ee3p, b\u1ea1n c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i m\u1ed9t v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn nh\u01b0ng d\u1ec5 b\u1ecb b\u1ecf qua l\u00e0 \"qu\u00e1 kh\u1edbp (Overfitting) \". Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y kh\u00f4ng ch\u1ec9 khi\u1ebfn m\u00f4 h\u00ecnh c\u1ee7a b\u1ea1n tr\u00f4ng ho\u00e0n h\u1ea3o tr\u00ean d\u1eef li\u1ec7u ki\u1ec3m tra, m\u00e0 c\u00f2n th\u1ec3 hi\u1ec7n k\u00e9m trong giao d\u1ecbch th\u1ef1c t\u1ebf, v\u00e0 c\u00f3 th\u1ec3 khi\u1ebfn b\u1ea1n ph\u1ea3i tr\u1ea3 gi\u00e1 b\u1eb1ng ti\u1ec1n th\u1eadt. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 v\u1ec1 qu\u00e1 kh\u1edbp t\u1eeb nh\u1eefng ph\u00e9p \u1ea9n d\u1ee5 \u0111\u01a1n gi\u1ea3n \u0111\u1ebfn gi\u1ea3i th\u00edch chuy\u00ean nghi\u1ec7p, v\u00e0 cung c\u1ea5p c\u00e1c bi\u1ec7n ph\u00e1p th\u1ef1c ti\u1ec5n \u0111\u1ec3 gi\u00fap b\u1ea1n \u0111\u1ee9ng v\u1eefng tr\u00ean th\u1ecb tr\u01b0\u1eddng ngo\u1ea1i h\u1ed1i.

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Qu\u00e1 kh\u1edbp l\u00e0 g\u00ec?<\/strong> <\/h2>\n
\nQu\u00e1 kh\u1edbp (Overfitting) l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng m\u00e0 m\u00f4 h\u00ecnh th\u1ec3 hi\u1ec7n r\u1ea5t t\u1ed1t tr\u00ean d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n, nh\u01b0ng m\u1ea5t \u0111\u1ed9 ch\u00ednh x\u00e1c tr\u00ean d\u1eef li\u1ec7u m\u1edbi ch\u01b0a th\u1ea5y. \u0110i\u1ec1u n\u00e0y x\u1ea3y ra v\u00ec m\u00f4 h\u00ecnh qu\u00e1 ch\u00fa tr\u1ecdng v\u00e0o c\u00e1c chi ti\u1ebft v\u00e0 nhi\u1ec5u (Noise) trong d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n, thay v\u00ec h\u1ecdc \u0111\u01b0\u1ee3c c\u00e1c quy lu\u1eadt ho\u1eb7c m\u00f4 h\u00ecnh th\u1ef1c s\u1ef1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1ecb tr\u01b0\u1eddng.

\nM\u1ed9t m\u00f4 h\u00ecnh qu\u00e1 kh\u1edbp, b\u1ec1 ngo\u00e0i tr\u00f4ng r\u1ea5t m\u1ea1nh m\u1ebd, c\u00f3 th\u1ec3 \"nh\u1edb\" ho\u00e0n h\u1ea3o t\u1eebng \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n, nh\u01b0ng th\u1ef1c t\u1ebf, n\u00f3 thi\u1ebfu kh\u1ea3 n\u0103ng \u1ee9ng ph\u00f3 v\u1edbi nh\u1eefng bi\u1ebfn \u0111\u1ed9ng th\u1ecb tr\u01b0\u1eddng ch\u01b0a bi\u1ebft. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 b\u1ea1n c\u00f3 th\u1ec3 ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c qu\u00e1 t\u1ef1 tin, cu\u1ed1i c\u00f9ng d\u1eabn \u0111\u1ebfn thua l\u1ed7.

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A. Kh\u1edbp k\u00e9m (Underfitted)<\/strong> <\/span><\/h3>\nKh\u1edbp k\u00e9m (sai s\u1ed1 thi\u00ean l\u1ec7ch cao)
\nM\u00f4 h\u00ecnh qu\u00e1 \u0111\u01a1n gi\u1ea3n, kh\u00f4ng th\u1ec3 m\u00f4 t\u1ea3 ch\u00ednh x\u00e1c c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a d\u1eef li\u1ec7u, d\u1eabn \u0111\u1ebfn sai s\u1ed1 hu\u1ea5n luy\u1ec7n v\u00e0 ki\u1ec3m tra \u0111\u1ec1u cao.<\/span>

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B. Kh\u1edbp t\u1ed1t (Good Fit \/ Robust)<\/strong> <\/span><\/h3>\nKh\u1edbp t\u1ed1t \/ \u1ed4n \u0111\u1ecbnh (c\u00e2n b\u1eb1ng gi\u1eefa thi\u00ean l\u1ec7ch v\u00e0 ph\u01b0\u01a1ng sai)
\nM\u00f4 h\u00ecnh m\u00f4 t\u1ea3 d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch th\u00edch h\u1ee3p, c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t t\u1ed1t trong hu\u1ea5n luy\u1ec7n v\u00e0 ki\u1ec3m tra, c\u00e2n b\u1eb1ng gi\u1eefa thi\u00ean l\u1ec7ch v\u00e0 ph\u01b0\u01a1ng sai.<\/span>

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C. Qu\u00e1 kh\u1edbp (Overfitted)<\/strong> <\/span><\/h3>\nQu\u00e1 kh\u1edbp (sai s\u1ed1 ph\u01b0\u01a1ng sai cao)
\nM\u00f4 h\u00ecnh qu\u00e1 ph\u1ee9c t\u1ea1p, qu\u00e1 kh\u1edbp v\u1edbi d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n, d\u1eabn \u0111\u1ebfn sai s\u1ed1 hu\u1ea5n luy\u1ec7n th\u1ea5p nh\u01b0ng sai s\u1ed1 ki\u1ec3m tra cao, kh\u1ea3 n\u0103ng t\u1ed5ng qu\u00e1t k\u00e9m.<\/span>

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Ph\u00e9p \u1ea9n d\u1ee5: Qu\u00e1 kh\u1edbp gi\u1ed1ng nh\u01b0 gian l\u1eadn trong k\u1ef3 thi<\/strong> <\/h2>\n
\nH\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng r\u1eb1ng b\u1ea1n \u0111ang chu\u1ea9n b\u1ecb cho m\u1ed9t b\u00e0i ki\u1ec3m tra m\u00f4 ph\u1ecfng tr\u00ean th\u1ecb tr\u01b0\u1eddng ngo\u1ea1i h\u1ed1i, nh\u01b0ng ph\u00e1t hi\u1ec7n ra r\u1eb1ng t\u1ea5t c\u1ea3 c\u00e1c c\u00e2u h\u1ecfi \u0111\u1ec1u c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y trong c\u00e2u tr\u1ea3 l\u1eddi c\u1ee7a s\u00e1ch gi\u00e1o khoa. V\u00ec v\u1eady, b\u1ea1n d\u00e0nh nhi\u1ec1u th\u1eddi gian \u0111\u1ec3 ghi nh\u1edb c\u00e2u tr\u1ea3 l\u1eddi, thay v\u00ec th\u1ef1c s\u1ef1 hi\u1ec3u \u0111\u01b0\u1ee3c \u0111\u1ed9ng l\u1ef1c c\u1ee7a th\u1ecb tr\u01b0\u1eddng. V\u00e0o ng\u00e0y thi, c\u00e2u h\u1ecfi c\u00f3 ch\u00fat thay \u0111\u1ed5i, b\u1ea1n ngay l\u1eadp t\u1ee9c kh\u00f4ng th\u1ec3 \u1ee9ng ph\u00f3, v\u00ec ki\u1ebfn th\u1ee9c c\u1ee7a b\u1ea1n ch\u1ec9 d\u1ef1a tr\u00ean t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3, m\u00e0 kh\u00f4ng th\u1ec3 linh ho\u1ea1t \u00e1p d\u1ee5ng v\u00e0o v\u1ea5n \u0111\u1ec1 th\u1ef1c t\u1ebf.

\nM\u00f4 h\u00ecnh qu\u00e1 kh\u1edbp gi\u1ed1ng nh\u01b0 \"h\u1ecdc sinh gian l\u1eadn\" nh\u01b0 v\u1eady: hi\u1ec7u su\u1ea5t c\u1ee7a n\u00f3 ch\u1ec9 gi\u1edbi h\u1ea1n trong d\u1eef li\u1ec7u l\u1ecbch s\u1eed c\u1ee5 th\u1ec3, m\u00e0 kh\u00f4ng th\u1ec3 th\u00edch \u1ee9ng v\u1edbi bi\u1ebfn \u0111\u1ed9ng th\u1eddi gian th\u1ef1c c\u1ee7a th\u1ecb tr\u01b0\u1eddng.

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R\u1ee7i ro c\u1ee7a qu\u00e1 kh\u1edbp trong giao d\u1ecbch k\u00fd qu\u1ef9 ngo\u1ea1i h\u1ed1i<\/strong> <\/h2>\n
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  1. Chi\u1ebfn l\u01b0\u1ee3c kh\u00f4ng th\u1ec3 t\u1ed5ng qu\u00e1t<\/strong> 
    M\u00f4 h\u00ecnh qu\u00e1 kh\u1edbp c\u00f3 th\u1ec3 qu\u00e1 ch\u00fa tr\u1ecdng v\u00e0o m\u00f4i tr\u01b0\u1eddng th\u1ecb tr\u01b0\u1eddng c\u1ee5 th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ed9t xu h\u01b0\u1edbng ho\u1eb7c s\u1ef1 ki\u1ec7n trong qu\u00e1 kh\u1ee9, d\u1eabn \u0111\u1ebfn vi\u1ec7c n\u00f3 kh\u00f4ng th\u1ec3 \u1ee9ng ph\u00f3 v\u1edbi nh\u1eefng bi\u1ebfn \u0111\u1ed9ng th\u1ecb tr\u01b0\u1eddng th\u1eddi gian th\u1ef1c.<\/li>\n
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  2. K\u1ebft qu\u1ea3 ki\u1ec3m tra sai l\u1ec7ch<\/strong> 
    K\u1ebft qu\u1ea3 ki\u1ec3m tra c\u00f3 th\u1ec3 khi\u1ebfn b\u1ea1n nh\u1ea7m t\u01b0\u1edfng r\u1eb1ng chi\u1ebfn l\u01b0\u1ee3c l\u00e0 th\u00e0nh c\u00f4ng, v\u00ec m\u00f4 h\u00ecnh \"nh\u1edb\" t\u1ea5t c\u1ea3 c\u00e1c chi ti\u1ebft trong d\u1eef li\u1ec7u qu\u00e1 kh\u1ee9, nh\u01b0ng kh\u00f4ng th\u1ec3 th\u00edch \u1ee9ng v\u1edbi th\u1ecb tr\u01b0\u1eddng trong t\u01b0\u01a1ng lai.<\/li>\n
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  3. T\u0103ng r\u1ee7i ro giao d\u1ecbch<\/strong> 
    Do m\u00f4 h\u00ecnh qu\u00e1 nh\u1ea1y c\u1ea3m v\u1edbi nhi\u1ec5u trong d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n, c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nhi\u1ec1u giao d\u1ecbch kh\u00f4ng c\u1ea7n thi\u1ebft, th\u1eadm ch\u00ed l\u00e0 \u0111\u00e1nh gi\u00e1 sai h\u01b0\u1edbng th\u1ecb tr\u01b0\u1eddng.<\/li>\n<\/ol>\n
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    C\u00e1ch tr\u00e1nh qu\u00e1 kh\u1edbp?<\/strong> <\/h2>\n
    \nMay m\u1eafn thay, qu\u00e1 kh\u1edbp kh\u00f4ng ph\u1ea3i l\u00e0 v\u1ea5n \u0111\u1ec1 kh\u00f4ng th\u1ec3 gi\u1ea3i quy\u1ebft. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c ti\u1ec5n c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n gi\u1ea3m r\u1ee7i ro, n\u00e2ng cao \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 t\u00ednh \u1ed5n \u0111\u1ecbnh c\u1ee7a m\u00f4 h\u00ecnh: 

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    1. X\u00e1c th\u1ef1c ch\u00e9o (Cross-Validation)<\/strong> 
      Chia d\u1eef li\u1ec7u th\u00e0nh t\u1eadp hu\u1ea5n luy\u1ec7n, t\u1eadp x\u00e1c th\u1ef1c v\u00e0 t\u1eadp ki\u1ec3m tra, \u0111\u1ea3m b\u1ea3o m\u00f4 h\u00ecnh th\u1ec3 hi\u1ec7n \u1ed5n \u0111\u1ecbnh tr\u00ean d\u1eef li\u1ec7u ch\u01b0a th\u1ea5y. X\u00e1c th\u1ef1c ch\u00e9o l\u00e0 c\u00f4ng c\u1ee5 quan tr\u1ecdng \u0111\u1ec3 ki\u1ec3m tra kh\u1ea3 n\u0103ng t\u1ed5ng qu\u00e1t c\u1ee7a m\u00f4 h\u00ecnh.<\/li>\n
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    2. Gi\u1ea3m \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a m\u00f4 h\u00ecnh<\/strong> 
      M\u00f4 h\u00ecnh qu\u00e1 ph\u1ee9c t\u1ea1p d\u1ec5 b\u1ecb qu\u00e1 kh\u1edbp. Ch\u1ecdn m\u00f4 h\u00ecnh \u0111\u01a1n gi\u1ea3n h\u01a1n, ho\u1eb7c gi\u1edbi h\u1ea1n s\u1ed1 l\u01b0\u1ee3ng tham s\u1ed1, c\u00f3 th\u1ec3 n\u00e2ng cao t\u00ednh \u1ed5n \u0111\u1ecbnh c\u1ee7a m\u00f4 h\u00ecnh.<\/li>\n
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    3. K\u1ef9 thu\u1eadt \u0111i\u1ec1u ch\u1ec9nh (Regularization)<\/strong> 
      S\u1eed d\u1ee5ng \u0111i\u1ec1u ch\u1ec9nh L1 ho\u1eb7c L2 \u0111\u1ec3 ph\u1ea1t c\u00e1c tr\u1ecdng s\u1ed1 m\u00f4 h\u00ecnh qu\u00e1 l\u1edbn, gi\u00fap m\u00f4 h\u00ecnh t\u1eadp trung v\u00e0o c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m quan tr\u1ecdng nh\u1ea5t, thay v\u00ec nhi\u1ec5u trong d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n.<\/li>\n
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    4. M\u1edf r\u1ed9ng t\u1eadp d\u1eef li\u1ec7u<\/strong> 
      N\u1ebfu c\u00f3 th\u1ec3, thu th\u1eadp th\u00eam d\u1eef li\u1ec7u l\u1ecbch s\u1eed, \u0111\u1eb7c bi\u1ec7t l\u00e0 d\u1eef li\u1ec7u trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n th\u1ecb tr\u01b0\u1eddng kh\u00e1c nhau, c\u00f3 th\u1ec3 gi\u00fap m\u00f4 h\u00ecnh h\u1ecdc \u0111\u01b0\u1ee3c c\u00e1c m\u00f4 h\u00ecnh th\u1ecb tr\u01b0\u1eddng r\u1ed9ng h\u01a1n.<\/li>\n
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    5. Gi\u00e1m s\u00e1t li\u00ean t\u1ee5c hi\u1ec7u su\u1ea5t c\u1ee7a m\u00f4 h\u00ecnh<\/strong> 
      Trong giao d\u1ecbch th\u1ef1c t\u1ebf, th\u01b0\u1eddng xuy\u00ean \u0111\u00e1nh gi\u00e1 hi\u1ec7u su\u1ea5t c\u1ee7a m\u00f4 h\u00ecnh, v\u00e0 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u ch\u1ec9nh th\u00edch h\u1ee3p theo s\u1ef1 thay \u0111\u1ed5i c\u1ee7a th\u1ecb tr\u01b0\u1eddng, l\u00e0 b\u01b0\u1edbc c\u1ea7n thi\u1ebft \u0111\u1ec3 ng\u0103n ng\u1eeba qu\u00e1 kh\u1edbp.<\/li>\n<\/ol>\n
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      Tr\u01b0\u1eddng h\u1ee3p: L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 nh\u1eadn di\u1ec7n qu\u00e1 kh\u1edbp?<\/strong> <\/h2>\n
      \nV\u00ed d\u1ee5, m\u1ed9t nh\u00e0 giao d\u1ecbch thi\u1ebft k\u1ebf m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c ngo\u1ea1i h\u1ed1i d\u1ef1a v\u00e0o nhi\u1ec1u ch\u1ec9 b\u00e1o k\u1ef9 thu\u1eadt, v\u00e0 s\u1eed d\u1ee5ng d\u1eef li\u1ec7u l\u1ecbch s\u1eed \u0111\u1ec3 ki\u1ec3m tra, k\u1ebft qu\u1ea3 cho th\u1ea5y t\u1ef7 su\u1ea5t l\u1ee3i nhu\u1eadn giao d\u1ecbch h\u00e0ng th\u00e1ng l\u00ean t\u1edbi 20%. Tuy nhi\u00ean, trong giao d\u1ecbch th\u1ef1c t\u1ebf, chi\u1ebfn l\u01b0\u1ee3c n\u00e0y l\u1ea1i th\u01b0\u1eddng xuy\u00ean sai l\u1ec7ch, th\u1eadm ch\u00ed d\u1eabn \u0111\u1ebfn vi\u1ec7c v\u1ed1n b\u1ecb s\u1ee5t gi\u1ea3m m\u1ea1nh. Sau khi ki\u1ec3m tra, ph\u00e1t hi\u1ec7n ra r\u1eb1ng m\u00f4 h\u00ecnh qu\u00e1 ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c \u0111i\u1ec1u ki\u1ec7n th\u1ecb tr\u01b0\u1eddng c\u1ee5 th\u1ec3 trong qu\u00e1 kh\u1ee9, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u00f4 h\u00ecnh dao \u0111\u1ed9ng c\u1ee7a t\u1ef7 gi\u00e1, thay v\u00ec h\u1ecdc \u0111\u01b0\u1ee3c c\u00e1c quy lu\u1eadt th\u1ecb tr\u01b0\u1eddng t\u1ed5ng qu\u00e1t h\u01a1n.

      \n\u0110\u00e2y ch\u00ednh l\u00e0 bi\u1ec3u hi\u1ec7n \u0111i\u1ec3n h\u00ecnh c\u1ee7a qu\u00e1 kh\u1edbp: qu\u00e1 ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c m\u00f4 h\u00ecnh c\u1ee5 th\u1ec3 trong d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n, thi\u1ebfu kh\u1ea3 n\u0103ng \u1ee9ng ph\u00f3 v\u1edbi bi\u1ebfn \u0111\u1ed9ng th\u1ef1c t\u1ebf c\u1ee7a th\u1ecb tr\u01b0\u1eddng.

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      K\u1ebft lu\u1eadn: Tr\u00e1nh qu\u00e1 kh\u1edbp, x\u00e2y d\u1ef1ng chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch \u1ed5n \u0111\u1ecbnh<\/strong> <\/h2>\n
      \nTrong giao d\u1ecbch k\u00fd qu\u1ef9 ngo\u1ea1i h\u1ed1i, qu\u00e1 kh\u1edbp l\u00e0 th\u00e1ch th\u1ee9c m\u00e0 m\u1ecdi nh\u00e0 giao d\u1ecbch \u0111\u1ec1u ph\u1ea3i ch\u00fa \u00fd. M\u1eb7c d\u00f9 n\u00f3 c\u00f3 th\u1ec3 khi\u1ebfn m\u00f4 h\u00ecnh tr\u00f4ng ho\u00e0n h\u1ea3o tr\u00ean d\u1eef li\u1ec7u l\u1ecbch s\u1eed, nh\u01b0ng \u0111i\u1ec1u th\u1ef1c s\u1ef1 quan tr\u1ecdng l\u00e0 m\u00f4 h\u00ecnh c\u00f3 th\u1ec3 cung c\u1ea5p h\u01b0\u1edbng d\u1eabn ch\u00ednh x\u00e1c v\u00e0 \u1ed5n \u0111\u1ecbnh trong c\u00e1c t\u00ecnh hu\u1ed1ng th\u1ecb tr\u01b0\u1eddng ch\u01b0a bi\u1ebft hay kh\u00f4ng.

      \nTh\u00f4ng qua c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111\u00fang \u0111\u1eafn, ch\u1eb3ng h\u1ea1n nh\u01b0 x\u00e1c th\u1ef1c ch\u00e9o, k\u1ef9 thu\u1eadt \u0111i\u1ec1u ch\u1ec9nh v\u00e0 m\u1edf r\u1ed9ng d\u1eef li\u1ec7u, b\u1ea1n c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u r\u1ee7i ro qu\u00e1 kh\u1edbp m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, gi\u00fap chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch c\u1ee7a b\u1ea1n tr\u1edf n\u00ean \u0111\u00e1ng tin c\u1eady h\u01a1n.

      \nH\u00e3y nh\u1edb r\u1eb1ng, th\u1ecb tr\u01b0\u1eddng lu\u00f4n thay \u0111\u1ed5i. Thay v\u00ec theo \u0111u\u1ed5i k\u1ebft qu\u1ea3 ki\u1ec3m tra ho\u00e0n h\u1ea3o, h\u00e3y t\u1eadp trung v\u00e0o vi\u1ec7c x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh giao d\u1ecbch \u1ed5n \u0111\u1ecbnh, gi\u00fap b\u1ea1n \u0111\u1ee9ng v\u1eefng tr\u00ean th\u1ecb tr\u01b0\u1eddng ngo\u1ea1i h\u1ed1i!\n<\/span>\n<\/div><\/div>\n\t\t\t\t
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      \n\nXin ch\u00e0o, ch\u00fang t\u00f4i l\u00e0 \u0110\u1ed9i ng\u0169 Nghi\u00ean c\u1ee9u Mr.Forex<\/a><\/strong>
      \n\nGiao d\u1ecbch kh\u00f4ng ch\u1ec9 c\u1ea7n t\u01b0 duy \u0111\u00fang \u0111\u1eafn m\u00e0 c\u00f2n c\u1ea7n c\u00e1c c\u00f4ng c\u1ee5 v\u00e0 th\u00f4ng tin h\u1eefu \u00edch. Ch\u00fang t\u00f4i t\u1eadp trung v\u00e0o \u0111\u00e1nh gi\u00e1 c\u00e1c nh\u00e0 m\u00f4i gi\u1edbi to\u00e0n c\u1ea7u, thi\u1ebft l\u1eadp h\u1ec7 th\u1ed1ng giao d\u1ecbch (MT4 \/ MT5, EA, VPS) v\u00e0 n\u1ec1n t\u1ea3ng forex th\u1ef1c chi\u1ebfn. Ch\u00fang t\u00f4i tr\u1ef1c ti\u1ebfp h\u01b0\u1edbng d\u1eabn b\u1ea1n n\u1eafm v\u1eefng \"h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng\" c\u1ee7a th\u1ecb tr\u01b0\u1eddng t\u00e0i ch\u00ednh, x\u00e2y d\u1ef1ng m\u00f4i tr\u01b0\u1eddng giao d\u1ecbch chuy\u00ean nghi\u1ec7p t\u1eeb con s\u1ed1 kh\u00f4ng.
      \n
      \n\nN\u1ebfu b\u1ea1n mu\u1ed1n chuy\u1ec3n t\u1eeb l\u00fd thuy\u1ebft sang th\u1ef1c h\u00e0nh:<\/strong>
      \n1. H\u00e3y chia s\u1ebb b\u00e0i vi\u1ebft n\u00e0y \u0111\u1ec3 nhi\u1ec1u nh\u00e0 giao d\u1ecbch th\u1ea5y \u0111\u01b0\u1ee3c s\u1ef1 th\u1eadt.
      \n2. \u0110\u1ecdc th\u00eam c\u00e1c b\u00e0i vi\u1ebft li\u00ean quan \u0111\u1ebfn       H\u1ecdc Forex<\/a>.\n<\/span><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

      \"Hi\u1ec3u r\u00f5 nh\u1eefng r\u1ee7i ro ti\u1ec1m \u1ea9n c\u1ee7a vi\u1ec7c qu\u00e1 kh\u1edbp (Overfitting) trong giao d\u1ecbch ngo\u1ea1i h\u1ed1i, n\u1eafm v\u1eefng c\u00e1c k\u1ef9 thu\u1eadt quan tr\u1ecdng \u0111\u1ec3 tr\u00e1nh s\u1ef1 th\u1ea5t b\u1ea1i c\u1ee7a chi\u1ebfn l\u01b0\u1ee3c, x\u00e2y d\u1ef1ng m\u1ed9t m\u00f4 h\u00ecnh giao d\u1ecbch \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u00e1ng tin c\u1eady!\"<\/p>","protected":false},"author":1,"featured_media":46304,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,83,100],"tags":[128],"class_list":["post-46302","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-forex-terms","category-learn-forex","category-expert-advisor","tag-no-google"],"_links":{"self":[{"href":"https:\/\/mister.forex\/vi\/wp-json\/wp\/v2\/posts\/46302","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mister.forex\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mister.forex\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mister.forex\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mister.forex\/vi\/wp-json\/wp\/v2\/comments?post=46302"}],"version-history":[{"count":0,"href":"https:\/\/mister.forex\/vi\/wp-json\/wp\/v2\/posts\/46302\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mister.forex\/vi\/wp-json\/wp\/v2\/media\/46304"}],"wp:attachment":[{"href":"https:\/\/mister.forex\/vi\/wp-json\/wp\/v2\/media?parent=46302"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mister.forex\/vi\/wp-json\/wp\/v2\/categories?post=46302"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mister.forex\/vi\/wp-json\/wp\/v2\/tags?post=46302"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}