Session close is a flatten rule, not overnight hope

The close is a flatten checkpoint

A same-session rule set treats the approaching close as a required flatten checkpoint, not as an optional pause before the next open. That checkpoint is the session-close-gate: a precommitted flatten or exit at the end of the trading session, belonging to the same procedure as entry and abstention.

If the holding period is the session, the planned flatten at the session boundary is part of the original rule set. Skipping it is not a small timing change. It changes the horizon, the inputs and the exit rule while still speaking as if the old procedure is in force.

Hope is not a valid rule input

Delaying a planned close because a losing position might resume its usual pattern at the next open and erase the loss is described as a common override of the exit rule. That delay is a hope-override: using expected next-session recovery as a reason to skip the planned close when a position is underwater.

Hope of a turnaround is treated as an invalid rule input. Once emotion replaces facts, patterns and numbers, the procedure is no longer being followed.

Gap-exposure and the recovery-add

An overnight hold after an unusually large same-session loss is recounted as turning a contained daytime shortfall into a far larger gap loss after adverse news at the open. That unplanned price change between the session close and the next open is gap-exposure. It appears only because the position remained open.

Adding remaining funds after that gap, in hopes a small rebound would offset the original shortfall, is described as a further break of the close rule. That step is a recovery-add: deploying additional capital after an adverse open in an attempt to offset the original shortfall.

Overnight holds are not claimed to produce ruin every time. A single adverse gap is argued to be enough to exhaust trading capital.

Keep the planned flatten

Keeping the planned flatten at the session boundary is presented as the control that prevents rewriting a same-session horizon into a multi-session hold. Changing a same-session holding period into a multi-session hold after a loss, without treating that change as a new rule to test, is a horizon-rewrite.

Editorial: the session-close-gate is what keeps entry, exit and abstention inside one testable procedure. Once the close is treated as optional, the holding period is no longer the session, even if the original wording still says that it is.