You probably saw that Andre Holmes had a big stat line in Week 6: 4 catches for 121 yards and 2 touchdowns. But you may not be as aware that he posted 5 catches for 74 yards and a touchdown in his previous game (Week 4 in London).
In that Week 4 game, Holmes had 12 targets, twice as many as the next guy on the Raiders. He only had eight in Week 6, but that was still tops on the team.
Holmes draws the Arizona Cardinals, who are the absolute worst team against fantasy receivers in the league, in Week 7. The heavy targets and good matchup are enough to give him a strong look on your Week 7 squad.