ในคลื่นที่เราสมมุติว่าเป็นคลื่น 2 เป็นการ Correction แบบ ZZ ซึ่งกฏ Rule of alternation ในบทที่ 5 ในหนังสือเขียนไว้ว่า " To continue with the assumption that your wave group is Impulsive, Alternation must be present between waves 2 & 4 in at least one of the ways mentioned above. (At this stage in the analysis process, you may or may not be working with more complex polywave patterns, so illustrations of simple and complex polywaves are presented on the next two pages for completeness.) Figure 5-3a shows the area of an Impulse pattern where Alternation is most critical and reliable. A. Diagram A shows Alternation on a price, time, and severity basis; wave-3 is the extended wave. B. In Diagram B, again the 2 & 4 wave Alternate in similar ways as shown in Figure A, but theextended wave has changed to wave-1. C. Diagram C changes some of Figure B's conditions; wave-4 is more severe, time consuming and larger in price than wave-2 and the extended wave is now wave-5. D. The only alternation in Diagram D is severity. The two corrections appear so similar as to make the pattern very suspect. Other possibilities would need to be considered and kept in mind until further market action clarifies the situation. If the entire Impulse pattern gets retraced more than" . .