break out then pull back

Hi Pat, For the break out stock, I remember you mentioned if it pull back to the base, we may sell half and watch. ex: $PINC, 9/27 it B/O with volume then no push. It went up at the beginning of yesterday, then pull back to the pivot, but we keep watching not selling some as we did for $BA yesterday. How to decide the sell rule for such situation? TY.