I'm assuming you're trading with 300:1 leverage.
Under the new rules, if you need currently need $333 to open that 1 lot trade, you will need $3,330 margin to open that same position as of March 29th. The margin required to keep a trade on regardless if it is in profit or loss is the same, it never changes once the position is open.
The way to you need to look at this position is like this:
With a 1 lot position size, you are controlling $100,000 worth of AUDUSD. You have $15,000 equity. If you position goes against you 15%, you will lose your whole account. Does that make sense?