Technical Update - S&P 500 stopped at key resistance, will it break it? Nasdaq 100 established short-term uptrend but it might be too fragile

S&P500/US500 testing strong resistance for further upside. It can be too strong to break and next couple of days will be key. Even if broken upside seems limited.
Nasdaq 100/USNAS100 lagging S&P500 but has established uptrend. An uptrend that seems fragile and can easily falter and slide back resuming bear trend

S&P 500 closed the gap Friday with a strong move higher. peeped just above the key resistance at around 3,807 only to close below. 0.382 Fibonacci retracement of the September sell-off is at 3,810. A close above needed to establish an uptrend.
RSI 14 is still below 60 threshold however, meaning it is still showing negative sentiment. If RSI is rejected at 60 the bear trend is likely to resume. If closing above, it is an indication of further upside momentum.
If S&P closes above 3,807, we could see a rally of another 100 points to strong resistance at 3,900.
55 and 100 SMA’s are coming down around that level i.e., the underlying sentiment is declining and will likely put a dampener on the possible uptrend. If that scenario plays out (that the Index closes above 3,807 and RSI above 60) S&P could run out of steam at the 0.618 retracement at around 3,879.

If S&P 500 slides back below 3,647 the bear trend will resume for lower lows. Look out ofr RSI breaking below its rising trendline