Quite simple logic.
Step 1. The big drop from late 2017 is not a impulsive wave, which make it a 3-wave pattern, therefore it's more possible a wave B is unfolding;
Step 2. The raise from late 2018 (wave B) didn't meet the minimum time requirement, the blue vertical line.
Step 3. The raise from late 2018 (wave B) didn't meet the minimum price requirement, the red horizontal line.
result: will keep on consolidating and exceed both the time and price requirement.
More detail will be added in the comment