If one subscribes to the minor wave 5 count, there could be "meaningfully" more upside, with today's high potentially being only iii of (iii) of [iii].
If one subscribes to a wave [x] rebound, wave [x] could have ended at today's high with a wedge or with one more push higher to complete the 2nd set of 7 waves.
These options can be seen when comparing SPX with NYA.