To determine a trend reversal, there are two dimensions: one is the magnitude of price fluctuations, and the other is the structure that the price has formed.
For example, for this wave of Ethereum (ETH), those who bought when the divergence and oversold signals appeared have now seen the price rebound by 95%.
However, even though the increase is close to doubling, I still cannot confidently say that this is 100% the bottom, because the price structure has not yet truly confirmed.