Anyone can help with this #3 I would greatly appreciate it. I was adding ROC but not sure I was getting largest drop in last 10 . 
Entry Conditions
1) Closed at a 20-day low.
2) Closed above the 200ma.
3) Today was the sharpest 1-day drop in the last 10 days.
Buy tomorrow at a limit price equal to today’s close if the above criteria is met.
    
    
    
    Entry Conditions
1) Closed at a 20-day low.
2) Closed above the 200ma.
3) Today was the sharpest 1-day drop in the last 10 days.
Buy tomorrow at a limit price equal to today’s close if the above criteria is met.
        Rename
    
        Yes, you could use something like 1-day ROC at new N bar high low:
    
    
        Since you're looking for a drop, it should "at New Low". 
    
    
        Good catch, updated my reply.
    
    
        Thank guys.  
    
    
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