Assume that you are using VTune Amplifier XE 2011 Update 4.
You can use predefined analysis type "General Exploration", which includes event BP_MISSP_EXEC, and CPU_CLK_UNHALTED.CORE. The report will report Branch Misprediction ratio automatically.
You also can create a new Custom Analysis - select new hardware events analysis for Intel? Core 2 Duo processor:
You canevaluate ratio BP_MISSP_EXEC/BR_INST_RETIRED.ANY manually to knowaverage missesper branchexecuting
You can evaluate ratio BP_MISSP_EXEC*(CPU_Frequency/CPU_CLK_UNHALTED.CORE) to knowaverage missesper second