After the important break of 0.6750 support back in March, AudUsd has tried and failed 3 times to reconquer that level. The pressure is clear to the downside and 0.66 support could fall soon. As long as resistance is intact bears are in total control and selling rallies could be a good strategy. A break of 0.66 would expose the next important level of support at 0.64, but in the longer term the pair could fall further and test 0.62 low.