Forex closes Friday at 5pm New York time and reopens Sunday at 5pm. Those 48 hours regularly contain elections, surprise central bank moves, and geopolitical shocks, and none of it can be traded until Sunday's first price prints wherever it prints. In between, your stop loss is a note pinned to a door of a closed building. There is no market for it to execute in.
The math of a gap through your stop
Take the standard setup: $10,000 account, short EURUSD on Friday afternoon, 0.40 lots, stop 25 pips away, $100 of planned risk. Textbook sizing. A weekend headline moves the dollar, and Sunday's opening price is 85 pips against you. Your stop triggers on the open and fills there: 85 pips × $4 per pip is a $340 loss, 3.4R, from a trade sized for 1R. Nothing malfunctioned. A stop caps risk only in a continuous market, and the weekend deletes the market. Most weekends the majors reopen within a few pips of Friday's close, which is exactly what makes the habit dangerous: it works dozens of times, then one event weekend gaps a pair 100 pips or opens gold $30 away and repays every pip you saved by holding.
Crypto inverts the problem without solving it. Bitcoin trades through the weekend, so there is no gap, but Saturday liquidity is thin, moves are outsized, and your risk management is asleep. A position held into a crypto weekend is a position managed by nobody. Different mechanics, same conclusion.
Your options on Friday afternoon
Flatten is the clean answer: close everything before the Friday close and pay the cost, which is forgone continuation. If the trade is up 1.5R, you bank $150 and accept that Monday's follow-through, if any, belongs to someone else. Reduce is the compromise: cutting a position to half size caps a gap's damage to half, so the 85 pip nightmare costs $170 instead of $340. Hedging is the option that sounds sophisticated and rarely is: an offsetting position in a correlated pair costs two spreads, tracks imperfectly, and correlations are least reliable during exactly the shocks you are hedging against. For an intraday trader the honest ranking is flatten first, reduce second, hedge a distant third. Whatever you choose, choose it by 3pm Friday with a clear head, not at 4:55 with one eye on a running winner. The decision deserves the same pre-commitment as a stop loss, because it is one.
The clean-slate advantage
Day traders give up overnight continuation, and in exchange they buy something underpriced: a career with zero gap exposure. Flat at the close means every Monday starts with the account exactly where Friday left it, every decision made in a live market with a working stop, and no Sunday evenings spent refreshing futures quotes. Across a few hundred trading weeks, the trader who is always flat at the weekend simply never takes the 3.4R hit, and the recovery math never gets a chance to compound against them. Discipline here costs a little upside repeatedly and saves the account occasionally, which is the trade risk management always offers.