BTC | A quick crash, why? But there's a support at 33000

After a retracement began from 36k, a follow through comes with high volume, I can't figure out why.

But I guess 33k would be a support.

Comment:

The second test is not finished yet. I personally don't want to go LONG.

Trade closed: target reached:

SC down to 33150 , and a secondary test around 33500-33700, we found a support line. now we are waiting for a SOS.