Wait the opportunity to short

There are three scenarios:
1. Up to 1.3840, down to 1.3450, up to 1.40-1.41, and down to 1.28
2. Up to 1.3840, down to 1.3450, and down continuously to 1.3450
3. Up to 1.3840, and directly to 1.40-1.41, and down to 1.28