Wednesday, July 7, 2010 Market Commentary: Stocks scored a follow-through day (FTD) on the fourth day of their latest rally attempt as volume, a critical component of institutional sponsorship, topped Tuesday’s levels. Advancers trumped decliners by over a 5-to-1 ratio on the NYSE and over a 3-to-1 ratio on the Nasdaq exchange. However, there were only 7 high-ranked…