the full article is linked below but the premise is to use the entry signal for a vectorial system as an exit signal for swing trading systems giving plunge protection, for the systems that I have tested so far this reduces the time in market, draw down and increases P&L through an increased trade count
I use this as well as the usual trailing stop, it helps if the trailing stop hasn’t kicked in and there is a sudden move and also if the trailing take profit is keeping its distance but the market reverses, you can can get out before the trailing stop/BE is hit