I think for every great trade timing you do there are 10 that suck, just the good ones stand out. No method, just gut-feeling and a bit of pattern matching, I guess. For the record, before market open I watch the pre-market and try to judge the "mood", the actual SP value itself isn't particularly important, but how it trades up/down and then whether I think it will pop or dump at open and by how much
Before open today I had low 201-2 as an initial pop and then set an optimistic sell order for the calls at a premium which would trigger at ~202.50, when it was clear this was out of reach I then look at the chart of the -c200's, see that 11.30 is a local peak, so then resubmit the order at that price - more often than not, these levels get revisited, as was the case today
And no, I deliberately didn't sell them, the idea being that they hedge this week's -p200's, deliberate strategy rather than carelessness, there was $5k for 30 minutes on offer there, but that's not what I was playing for, yes I could have taken that, then resold when it popped back up, but what if it kept going down...? And thanks to those, I can now leave the puts running until Friday without too much worry - lots of extrinsic still for this week
Maybe there'll be an IV crush after the FOMC minutes are release and/or a crash/rally/nothing, etc., who knows...