It's been a topsy-turvy day for local investors who watched the sharemarket plunge earlier in the session, only to recover and then fall once again. The S&P/ASX 200 (Index: ^AXJO) (ASX: XJO) peaked above 5,600 points but has since fallen nearly 0.2% to trade at 5,577 points. The ALL ORDINARIES (Index: ^AXAO) (ASX: XAO) is also down 0.2%. Despite the market's undecidedness, these four stocks are enjoying particularly strong performances today… Slater & Gordon Limited ( ASX: SGH ) managed to defy the market's bad mood with its shares lifting 2.3% to $3.55, after hitting an intraday high of $3.65. Although investors still seem reluctant to buy back into the once high-flying legal eagle they may see value at the stock's current level. Greencross Limited (ASX: GXL) is another stock that has retreated from its intraday high although it has still risen a respectable 2.6% for the session.