Compact camera and softbox in the same sentence? YES! Who needs a hot shoe? A pocket camera like a Sony a5100 or RX100 or Lumix GM1 and watch MarkusPix take off-camera flash portraits like a pro!  How does one do photography like this with a compact pocket camera? 

Getting professional photography results with a softbox or umbrella while being resourceful with low-cost cost less expensive options. Forget high-speed sync. You don't need HSS! Forget flash triggers, they are annoying anyway. This is way cool, so watch this photography trick.

Note: 

S1 mode is basic flash trigger

S2 id for when your camera uses a pre-flash before it actually fires the main flash. If you're using TTL and your camera fires a pre-flash, use S2