RANK FUNCTION YOUTUBE (10 Best Free Optimization Hacks!)

This video, https://www.youtube.com/watch?v=F9g_lSY4KxA, can also be seen at https://www.youtube.com/channel/UChVBYFA9ouGkalqx5X3suTg.
See the rest of the story at http://www.hytechpowerequipment.com/rank-function-youtube-10-best-free-optimization-hacks/