Median line - pitchfork trading

I am lerning pitchfork tools too, I got some complications because there is 2 problems that I’m sure you may have also had:
-Choosing the right pivots to drawn the median line
-Not knowing if it is going to stop and reverse or pierce it and then use it as support/ressistance.
Hope to get in contact with you :D. Cheers bro, from Spain, Jordi.