Taking a look at a longer timeframe in the weekly chart for SDL...

Taking a look at a longer timeframe in the weekly chart for SDL you can clearly see the higher highs, higher lows = uptrend.

Its also pushing out of the Bollinger bands = bullish. Notice how the uptrend began back in 2010.

Weekly moving averages 10 EMA and 20EMA pointing up after being in a downtrend since January.

SDL might pause here a little longer (the slow stochastic is about to cross down) then re-set for an attack of 15c and 21c in my opinion.