AUDNZD Spike at Retracement

I was able to catch a short term bearish breakout on AUDNZD this week. I closed half at a target and then the remainder stopped out. Following this I noticed a very sharp reversal. My scanner alerted me to a spike on the Daily timeframe. Sure enough the spike is happening right at the 50% retracement of the whole year! This is a low risk, long term trade I have to take according to my rules.