I believe that I remember Goenka, in one of his videos, saying that once you feel a free flow of energy you should stop sweeping from top/bottom and go left to right back to front to check for stagnation. If there is nothing detected then switch to whole body awareness. 

For some reason, I think I heard this on an online talk so I started listening to his 10-day talks on youtube and even searched the transcripts. For the life of me, I can't find it and was hoping someone knew where this information is located if he mentions this.

Thanks,
Jorge

I think he mentions that on Day 7 or 8. He probably mentions it twice, once in the daily instruction segments and once again in one of the evening dhamma talks

This is the best possible advice for result of meditation although easier said than done!