let me share with you a really good example of trading a harmonic gartley pattern with c confirmation signal.
first of all we need to identify a potential reversal zone for our trade. on a higher timeframe just look left and find a range between two significant levels of resistance.
when you identified a potential reversal zone, wait until the market approaches this zone, when it happens, go to a lower timeframe and look for reversal signals and patterns. here we have a nice head and shoulders pattern + bearish gartley pattern + rsi overbought.
you execute your trade only when you see a violation of a neckline. it is your confirmation trigger.