Lesson Learned: Not respecting the daily close on $SPX options

Hey everyone, fairly new here, just wanted to introduce myself and share a recent learning curve. I've been playing around with $SPX options, specifically trying to catch end-of-day moves. One thing I've learned the hard way is not respecting the daily close and the potential for a complete reversal within the last hour. I've been caught a few times trying to hold positions into the close, only to see them evaporate because I didn't lock in profits when they were there, thinking the momentum would carry through. It's a humbling reminder that intraday trends can be fickle.