I feel like maybe it is like a pseudo fox-trot where you run cancel (crouch after dash ends) to force the fox-trot timing. In the top comment on that reddit link:
pstrmclr gives us this link:
http://smashboards.com/threads/2014...nowledge-updated-1-2-14.339520/#post-16153183
In that particular post, it shows the amount of frames everyone's dash lasts - this is what determines dash dance length and when their run starts where you can run cancel (crouch to cancel your running).
It also shows the frame at which you can fox-trot. Here is a video demonstrating it:
https://www.youtube.com/watch?v=mOHU_33iaQg
Crouching only takes like 2 frames, and then you can dash out of it.
If you look at the frames in the post, you will notice that the amount of time between ending your dash and starting your run is massive compared to 2 frames.
Fox: dash lasts 11 frames, fox-trot can start on frame 20. That is 9 frames meaning you can easily fit a run cancel in there.
If you look at the fox trot video I linked (
https://www.youtube.com/watch?v=mOHU_33iaQg), there is the "long" fox trot that is done after. Basically, what is happening there as opposed to the short one, is the stick is being held for exactly 10 frames and then being let go resulting in maximum distance fox trotting. By run cancelling, you could get this effect without having to be frame perfect with your dash.
What I think the technique may be is this:
Dash until you start running, run cancel, then dash again. Seems not very interesting, but basically, it would be like forcing the fox trot timing to be what you need it to be. It could give you greater control during dashing and running.
