A genuine intraday system force-flattens — closes every open position before the market closes, holding nothing overnight. It sounds cautious; it's actually the rule that defines and protects the entire day-trading approach.
Overnight gap risk
Markets move while they're closed. News, earnings, and overseas action can gap price far from where it closed, and a position held overnight can open deeply against you with no chance to react (pre-market and after-hours). Day trading exists precisely to avoid this exposure — so holding overnight breaks the premise (day vs swing trading).
The 0DTE reason: expiration
For same-day options the stakes are higher: a 0DTE option held to expiration either settles or expires worthless — a manageable loss can become a total one, and a winner can round-trip to zero on a close reversal (0DTE risk management). Flattening before the bell turns "hope it comes back" into a closed, known outcome.
Force-flat converts every position from an open question into a closed answer. Nothing carried, nothing to gap, nothing to pray about overnight.
Discipline by design
The hardest part of flattening is emotional — cutting a loser you're sure will recover, or a winner you want to let run. A rule removes the argument: everything closes, every day, no exceptions (mechanical vs discretionary). NoVo’s read stays live into the final minutes, so you can see whether the structure into the bell argues for holding on or getting out. The decision, and the order that flattens you, are yours.