I was wondering if there is some kind of shortcut or some kind of trick do reliably do it. I got problems inputting the DP motion after the last low jab, often Hadoken comes out instead of Shoryuken.
There is an input shortcut for DP that you can use: :df: :d: :df: + :hp:
this way you can avoid having to input forward and getting a hadoken.
But above all else: