Ascending wedge rally is the "last struggle"

The curvature of the lower rail is higher than the upper rail, meaning the rate at which lows are rising is far greater than the rate at which highs are forming, gradually showing weakening upside momentum with small-level reversals continuing the larger-level downtrend.

The true formation of a bottom also requires multiple downside tests to confirm, generally speaking a descending wedge forms the base, an ascending wedge induces longs, and a descending wedge means downside momentum is exhausted thus forming the bottom.