One of bunch examples (ETH):

• Plunge in January 2018, then correction above 61,8% fibo level and -27,1% target:
  
• Plunge in February 2018, then correction to 61,8% fibo level and -27,1% target:
  

But I have to admit, that sometimes it just break previous low and reverse without hitting -27,1% fibo level target!