Taking a Stab at the Dow; Chess Moves

I went long SDOW at $19.22 with a tight stop below $19. SDOW Is the ultra-bearish Dow ETF. 

This position is potentially a day-trade for me, depending on how it plays out in the final 60-90 minutes of the session. 

The theory behind the trade can be seen, below, on the DIA (Dow ETF) hourly timeframe. 

Note that today's AAPL/DIA rally took the Dow ETF up to its middle Bollinger Band on this timeframe, as well as prior broken support.

Simply put, this is a bet that prior support will turn into at least short-term resistance.