Number the rows!
Sequential numbering of rows (like a spreadsheet) would help in quickly selecting "top 10" or "20" or selecting every X-th stock in a cherry-pick without resorting to counting every time!
Kelvin Fields shared this idea
Bill Martin commented
OR......if you cannot/will not number the rows...how about making the line under every 5th, or every 10th, etc. BOLD, or darker, or wider?