Hello everyone,

I’m struggling with implementing a proper range compression check in my screener. The requirement is:

Current candle’s range (high and low) must be fully contained within the range established by bars 5-14 ago (10 bars total).

I’ve tried several approaches but stocks making new highs are still appearing in results:

// Attempt 1: Using built-in functions  
startIdx = 5  
length = 10  
windowHigh = Highest[length](High[startIdx])  
windowLow = Lowest[length](Low[startIdx])  
rangeCompression = High <= windowHigh AND Low >= windowLow  

// Attempt 2: Manual FOR loop  
windowStart = 5  
windowEnd = 14  
windowHighestHigh = High[windowStart]  
windowLowestLow = Low[windowStart]  
  
FOR i = windowStart TO windowEnd DO  
    IF High[i] > windowHighestHigh THEN  
        windowHighestHigh = High[i]  
    ENDIF  
      
    IF Low[i] < windowLowestLow THEN  
        windowLowestLow = Low[i]  
    ENDIF  
NEXT  
  
rangeCompression = High <= windowHighestHigh AND Low >= windowLowestLow  

What am I missing? I’ve confirmed that stocks breaking to new highs (where current High > any High from 5-14 bars ago) are somehow passing this filter.

Could anyone spot an issue with my implementation or suggest a bulletproof way to ensure the current candle is ENTIRELY contained within the historical range?

Thanks in advance!

David