The support Ethereum must hold

I am watching the lower timeframe (1 hour) support of 4046 as a major defining level. This was a support zone in the last week, the level price initially respected before the crash completed, and is now the 50% Retracement level of the crash which has been conquered and held so far. Holding this level is key to a rally. Breaking the level would indicate a high probability of retesting the crash low.