Short into resistance

Premarket this morning I shorted into the previous high of 3.79 and the $4.00. My targets were 3.55 and 3.80. which were the 3.50 support level and the previous high of 3.79. The targets were quickly hit. I want some insight on how to determine that this stock was going as far as it did, all the way down to 2.67.
Beyond Technical Analysis

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