The chart is self explanatory, in a few words a comparison between how the 2014 - 2015 bear market reached its bottom and the similarity with the price action at hand.
Based on that comparison, December's 3150 bottom was a temporary one much like the 278 during 2014 - 2015. A maximum peak at 4600 is to be expected followed by the final blow of -65% for a 1600 low. This must be the permanent bottom for the 2018 - 2019 bear market. What follows after is a lengthy accumulation and recovery period.