Wave-b รูปแบบ Weak-b Flat บทที่ 5 เขียนไว้ว่า "Weak b-waves are characterized by their less than normal retracement of wave-a. To classify as a weak b-wave, it must retrace between 61.8%-80% (inclusive) of wave-a. If the c-wave is less than 100% of wave-b, the pattern should be called a Double Failure. If wave-c is between 100% - 138.2% of waveb, the pattern should be called a B-Failure. If wave-cis longer than 138.2% of wave-b, it will once again fall under the Elongated Flat category." คลื่น c ถ้ามีขนาดสั้นจะเรียกว่า C-failure รวมกันคือ Double Failure แต่ถ้ามีคลื่น d และ e ก็จะเป็น Triangle
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