The construction of the pullback bundle can be carried out in subcategories of the category of topological spaces, such as the category of smooth manifolds.
Specifically, lower indices are covariant indices, and transform via pullbacks, while upper indices are contravariant, transforming under pushforwards.
Interestingly, such countertrend reversals often see deep retracements and therefore it makes sense to keep an eye out for whether we see any response to the 76.4% pullback ($1.1133).
