My belief is that you can only differentiate the end of a correction from a dead cat bounce in hindsight. I.e. you have to wait and see whether prices continue downwards, or start consistently going up again. I think you're searching for an answer that no-one has.
yeah, it's only possible in hindsight.
you can get a feel for the
probability of a long term bottom based on volume, whether major price support levels were tested, and the length of time spent in the downtrend. but no technical indicators can ever tell you in a
predictive sense when the bottom will be in.
there's no point calling the bottom until you've actually seen an uptrend formed. by the time this happens, price will be nowhere near the lows anymore. this is basic
dow theory.