After hitting the 50% retracement level 1.0182 to 0.9537 at 0.986, AUD-USD looks set to challenge the high of 0.9953 next. Yesterday’s retracement is so far limited to the 23.6% retracement of 0.9537 to 0.9937 at 0.9847. Further decline, if any, should be contained above the 55-EMA which is close to the 38.2% retracement level at 0.9874. Sustained rally above 0.9953 would confirm the 3-waves decline from 1.0182 to 0.9537 is completed and AUD-USD is set to challenge its all-time high of 1.0182 and above. On the downside, a close below the 55-EMA on the 4-hourly chart would be the first warning that the bullish is in doubt.