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 puts this one click away for 0/1-DTE — the read stays live into the final minutes and the close is a single tap — so getting flat before the bell is as easy as it can be, even though the call stays yours (the DTE dial).