"Last week we've had a clear downside move on AUDUSD. Right now it looks like this move will continue and we're looking for a possible entry. "
Price reached the resistance zone and it bounced off. That looks like an appropriate moment to get into a short position. However, this move is still kind of weak and so we could see another pullback to the resistance zone. Every impulse and a breakout of previous lows will confirm this direction.
Do not use big lot size when there is indecision in the market!