Yeah I'm gonna agree with @destriero here, albeit we're already down .55% as I type. I think we keep dropping. Anything above 11,736.... sell it. Down week is on the way. jmo though.
Here's your huge gap up on Sunday night open, you maroon. You got it wrong last week as well. And the week before that. And the week before that. And the week before that. Face it, dude, there is risk in the market. Anyone who follows your "guideposts" has lost money this year. Including yourself. Stick with your auto-strat trader, it does way better than your multi-mlillion dollar holds overnight where some how, and in some way, you never get a margin call.
You literally bought a top, though. It's been going down ever since. So, no, it actually does matter where you buy even if it goes higher eventually.