Ascending wedge surge is the "last struggle":

When the curvature of the lower trendline is higher than the upper trendline, it means the rate at which lows are rising far exceeds the rate at which highs are forming, gradually revealing weakening upside momentum with small-degree reversals continuing the larger-degree downtrend.

A true bottom formation also requires multiple tests and validations to be confirmed. Generally speaking, a descending wedge forms a bottom, an ascending wedge is a bull trap, and a descending wedge indicates that downward momentum is exhausted, thus forming a bottom. $BTC $ETH