We considered a background rise, but due to several considerations our most likely explanation (in our opinions) is that this feature is due to a fog bank rising and falling.
The team concluded that this feature most likely originated from the presence of a fog bank close to the horizon that rose and fell during the period of observation.
Investors get swamped with information, media noise, breaking news, politicians, gurus, and derivatives --- so much so that they can't see the oncoming fog banks and tsunamis of cyclical change.