It's not just AUDUSD that's being influenced today 3 Oct
USDCAD is being pulled around by a combination of CADJPY and oil demand and option expiry interest of its own nearby at 1.3100.
Lows so far of 1.3068 from 1.3138 there appears to be an attempt underway to head back above 1.3100 helped by oil capping again.
Currently 1.3095 with Brent $50.42 from $50.90 and WTI $48.61 from $48.87. CAD traders will be well advised to bear the options in mind. Seeing a dip back to 1.3087 even as I finish typing this sentence.
Remember that these are "vanilla" options so still in play right up to expiry at 14.00 GMT on the day even if breached in the meantime, unlike barrier options.
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