2nd possibility: it drops but not beyond 1310, then up to 1650 more or less
Time: this could happen in several days if the move continued sideways
I am doubting about impulsive wave (12345) because the 2nd wave should have been -50% at least but it made 38.2%.
If it was an ABC then C would coincide with the measurement (161.8% = 1647cny)
Take a look at the purple ABC