What now for BHP & the Commodity BOOM?

BHP Monthly Chart 

Like its brethren RIO & VALE; BHP fully reflects the market's view on the commodity 'boom'.
Is it 'bust'?
Below A$30 would be the 1st major sign that a 'bust' is underway; the MACD giving a Sell Signal whilst below the Zero Line implying that the post 2009 recovery has run its course & 'reality' beckons for the brave.