The unusual move off the March low in terms of duration and size would under typical circumstances raise some concern of it being extended. However, short term price patterns for the S&P are still supportive for early next week as long as it holds above the 835/833 area. Resistance above the weekly high (845) is at 849/851 and 861/862.
Other Major Support at 826 and 815
Other Major resistance at 861, 870