Retracements after strong surges a la since 3/23 per @sentimentrader:
1) &lt; 25% of initial gain '60
2)  75% of initial gain in '70
3) 62% in '79
4) close to none in '82
5) 38% in '84
6) 50% in '08
7) 23% in '09
8) 62% in '11
9) zero in '19

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