Word of caution as an afterthought - 

Leveraged ETF's move exponentially, especially in a directional market.

Short is a bad play in the risk factor because in theory you could experience endless losses, in other words, these leveraged short ETF's are an excellent hedge strategy, but NOT a good play for gains when using indicators or historic price movements because if a market like China has been moving rapidly in one direction, leveraged ETF's will move in greater and greater exponents away from the highest point compared to the underlying index.

Worse, if the market starts moving sideways, both long and short leveraged ETF's loose money...take a peek at any of proshares ultra funds back last fall to see what I mean, especially look at Direxions 3X funds and you'll see both long and short leveraged ETF's lost substantial amounts of money when the markets were ranging in extreme ups and downs.