This does look like it needs another high to complete a clear looking 5 waves up from the low I have as [B]:
SPX 1 min close up:
If we get it, the question will be whether its all of [C] or just wave (1) of [C]. We'd need to take out the [B] wave low to avoid the possibility of an extending [C] wave.
If we don't get a new high and drop below the high I have as wave (1), it will look like 3 waves up, but it may be one of those waves with a small 1 and 3 then an extended 5 - see the wave from [4] to [5] on this chart. Again, even if this happens, the high today may only be part of [C] until we take out the [B] low.