Traditionally, you would trade the inverse head and shoulders by entering a long position when the price moves above the neckline. You would also place a stop-loss order (trade stop at a set point) below the right shoulder's low point.
There are 2 entry possibilities, 1-Conservative Entry is at the break of the Neckline 2-Aggressive Entry is in the middle of the Right Shoulder
I'm an Aggressive trader so I like to enter in the middle of the right shoulder which makes a better Risk / Reward Ratio.
Targets, I always like to take 50% profit at the 50% mark of the measured move.