The reverse spread, commonly known as "selling high and buying low", is also a very easy way to unwind, that is, when the market is in a range oscillation, it is often tied to a relatively high level to close the position, and when the market drops to a relatively low level, it is bought again, waiting for the high level to sell again, in order to earn the middle price difference and achieve the purpose of cost sharing.
Risk: The risk of reverse price difference is relatively small. As long as the upper and lower tracks of the oscillation range are relied on, operations can be carried out smoothly. However, if the oscillation range turns to the bottom, there is a risk of going short when selling on the upper track. If the oscillation range turns into a downward relay, there is a risk of being trapped again when buying on the lower track.