SPX 4500 Retest - Watching for Confirmation

Watching the SPX closely today. We've seen a pretty swift move off the lows and the 4500 level is acting as solid resistance right now. I'm looking for a clean break and hold above 4500 on higher volume to confirm a potential push towards the 4550-4560 zone. My invalidation for this scenario would be a decisive rejection from 4500 and a move back below 4480, which would suggest a retest of the recent 4450 support. The dollar strength could be a wild card here. Not making any moves yet, just observing how price interacts with this key level.