Some market movements do not come announced (eg the recent JPY flash crash, Donald Trump making surprise market-shocking announcements etc) so I manage such unforeseen risk by choosing pairs with similar "risk correlation". Pairs like AUDNZD are less sensitive to these awe-and-shock events since both are considered risk currencies. If AUD goes down, NZD is likely to follow too, hence mitigating the risk of a one-way aggressive move. I have done testing on demo accounts and have observed that such currency pairs yield lower DD than "opposite risk correlation" pairs like AUDJPY, which experienced a much steeper DD when such events strike, since JPY is a safe-haven currency.
When the DD is better managed during unforeseen circumstances, the results naturally improve.