Corrections in DJI, 10%-14%, since 1945...

      The faster the decline, the more likely there will be more test:
          Examples 1948 - 12 day decline, 2 more tests needed and then breakdown.  
                            1955 -  12 day decline, no more test...  IKE heart attack...  
                            1978 -  11 day decline, 3 more tests needed and then full recovery 
                            2018 -  9 day decline,  4 tests needed and then 70% recovery.  
             (Each test must be five days apart.)

         None of the declines shown below   were as fast as the February 2020 case shown immediately below. 
         But assuming the size of the   decline, 10%-14% is they key now to predicting what will happen
         and the bottom has been made even though there is no Peerless Buy, the odds of a 50%+ recovery are 13 of 15.
                34% recover  only is ... 1960, 1984,
                50% recovery only is... 1948, 1956(2) 
                68% recover only is... 1971, 1978, 1994, 2015, 2018
                a full recovery is... 1955, 1956(1), 1965, 1979,  1990,  2016
         

Nov 1948  quick 50% recovery

1955 - Not quite a 10% decline and complete recovery.

1956 (1)   Complete Recovery

1956 (2)  Only 50% recovery

1960  70% recovery

1965 Full Recovery

1971  H/S, 12% decline, 70% recovery

1978  68% recovery

1979  Complete Recovery

1984  12% decline 34% recovery

1990  Complete recovery

1994 68% recovery

2015 Immediate 68% recovery

2016 Complete Recovery

2018  70% recovery