calculate a block size ratio by dividing a number of {HEAD ~ block size correlation coefficients} above {TAIL ~ a first threshold} by a total number of block size correlation coefficients 
above
calculate a block size ratio by dividing a number of { HEAD ~ block size correlation coefficients } above { TAIL ~ a first threshold } by a total number of block size correlation coefficients
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH