I don't know any more what I think. I'm thinking in a traditional X stroke, the heel starts top left side of the strop, ends bottom right of the strop. Then you flip the blade, and heel starts bottom left, end top right.
In MY stroke, heel starts top left, ends bottom right, I then flip, heel starts bottom right, ends top left. Again, it's just one diagonal of the X top left to bottom right, then bottom right to top left. I don't do bottom left to top right