This is very simple, the Elliot Wave count begins at the X point for the Gartley. The Gartley B point and D point neat perfect ratios. The D point is the beginning of wave iii if you are and Elliot trader, or a Gartley reversal if you are a harmonic trader. The count and the wave both happen near long term support. Elliot folks like to get in at the start of wave three. Garley folks like patterns that complete near major s/r. Both disciplines compliment each other in this case, and the stop is set at the x point which is also the beginning of wave i. EW says wave ii cannot exceed the start of wave i so we have a good stop for great risk reward.