Overnight session just gave us a 20-point dump on $SPX in 20 minutes. If you're not watching these moves, you're missing setups. Liquidity sweeps and gap fills happen when most traders are asleep — that's where edge lives. Whether it's futures, options positioning for the open, or just reading flow into the session, the overnight tape matters. Not saying trade every tick, but ignoring it? You're flying blind into the cash open.