$SPX Dark Cloud Cover Pattern 
Daily appearances since 2010-01-04: 87
Performance (Close) 5 days later ±:
Avg: 4.71
Worst: -153.11
Best: 123.95 

10 days later:
Avg: 4.52
Worst: -169.08
Best: 139.90 

30 days later:
Avg: 13.17
Worst: -792.76
Best: 312.20