Online marketing and advertising solution provider ReachLocal, Inc. of Woodland Hills was this week’s biggest mover, gaining 184 percent to end at $4.55. Monrovia-based Xencor was also among the week’s big movers. The engineering platform gained 41 percent to end at $18.93. Branded consumer platform Differential Brand Group was the week’s biggest loser, dropping 15 percent to end at $3.