Two major things to watch is there are now 3 consecutive and descending peaks in all US indices. For example; the SPX has peaked at ~3027, ~3020 and ~3009. Typically, a triple descending peak is extremely bearish. Further, while I am not a proponent of the RSI as it is oversimplified, it does tell the story over the long-run. In this case, the RSI has been under divergence over the last 12-14 months and falling after every additional 'top'.
Technicals have been shot in this last run and I see little chance of ATHs unless a FULL USA-China deal happened within the next month (which isn't happening). Rate cuts are already baked into this market and will provide no additional buffers to the market UNLESS Powell begins cutting 50bps or clearly says he is entering a long-term easing cycle.
There must be a close above 3009 for a potential blow-off top. With the latest Brexit news, I wouldn't be surprised for the US indices to fall 1% early next week perhaps beginning on Monday.