6,000 is the number to watch. The SPX tapped the level soon after the open, though Kevin Green sees it serving as a strong resistance for the index. He says a pullback is possible if traders can't sustain strength seen at the opening bell. Turning to other indices, Kevin notes the importance of the RUT as a signal for risk-on trade. After Tesla's (TSLA) significant sell-off on Thursday, Kevin talks about the stock technicals investors should watch.