Your stop is a resting order, not a force field. When price teleports past it on the open, you get filled wherever the book reopens — and on a funded account, a single gap can breach a limit you spent weeks staying inside.
Why stops fail across a price gap
A stop-loss only works if there’s continuous price to trade through. Markets close, and while they’re shut, news, positioning, and liquidity shifts keep moving the “fair” price with no orders executing. When trading resumes, the first print can be far below (or above) your stop level. Your order fills at that first available price — slippage across a gap is unbounded in principle.
The practical takeaway: a stop caps your risk during the session, not between sessions. Anyone sizing a position purely on the distance to their stop is assuming continuous liquidity that isn’t guaranteed once the bell rings. For anything you hold past the close, your real risk is the gap, not the stop.
Overnight vs weekend gap exposure
Not all held-through risk is equal:
- Overnight (intraday-to-next-session): For futures and FX, the market barely sleeps — the pause is short and gaps tend to be smaller because fewer hours of new information accumulate. Equities and index products that halt for the full evening carry more room to move.
- Weekend: Two-plus calendar days of accumulating catalysts — elections, geopolitical events, central-bank leaks, Sunday-open FX repricing — with no ability to react until the reopen. Weekend gaps are the ones that breach accounts.
The asymmetry matters. A position you’re comfortable holding for an hour into the close is not automatically safe to carry across 60+ hours of headline risk. Treat the weekend as a different risk regime, not just “a longer overnight.”
Reducing size for positions held past the close
The cleanest lever is size. If your stop no longer defines your worst case, then your position has to be small enough that a plausible adverse gap still leaves you inside every limit.
A workable rule of thumb: decide the largest gap you’d want to survive without a bad day, then size so that gap costs less than your normal per-trade risk — not more. Run the numbers before you carry anything:
- Halve (or quarter) the size you’d take on a purely intraday trade.
- Size to the gap, not the stop, using a position size calculator with the wider distance plugged in as your effective risk.
- Never let a held-overnight position be your largest open position — that’s backwards.
Hedging or flattening ahead of known risk events
When the catalyst is on the calendar, you have cleaner options than hoping:
- Flatten. The simplest hedge is no position. Closing before a major, scheduled binary event (a rate decision, a major data print, a referendum) removes gap risk entirely. There’s no shame in sitting out an event your edge wasn’t measured on.
- Reduce and define. Trim to a size where the worst plausible gap is an acceptable, pre-decided loss.
- Hedge the exposure. An offsetting position in a correlated instrument, or an options structure, can cap the tail — but only if you actually understand the correlation and the cost. A sloppy hedge is just two positions.
Whatever you choose, decide it before the close, in writing. The worst decisions get made at 3:58pm on a Friday with an open winner you don’t want to give back.
Prop-firm rules on holding overnight and over weekend
Firms vary widely, and the rules change — always confirm the current terms directly with your firm before you carry anything. Broadly, you’ll see a few patterns:
- Some firms prohibit holding through the weekend entirely, or restrict it to certain asset classes or account types.
- Some allow overnight but not weekend, or the reverse.
- Some permit both but still enforce a trailing or intraday drawdown that a gap can breach even if the “hold” itself is allowed.
Two positions can be identical in the market and different in the rulebook. Read your specific challenge and funded terms, and if the language is ambiguous, ask support in writing and keep the reply. Getting a payout denied over a weekend hold you thought was fine is an entirely avoidable way to lose an account.
Modeling worst-case gap against your drawdown limit
Before you hold, do the arithmetic against your buffer, not your P&L:
| Input | Where it comes from |
|---|---|
| Position size | Your intended lots/contracts |
| Plausible adverse gap | Recent gap history for the instrument, biased larger for weekends |
| Resulting loss | Size × gap distance |
| Remaining drawdown room | Distance from current balance to your firm’s breach level |
If the resulting loss is a meaningful fraction of your remaining room, you’re too big. A drawdown calculator makes the “how much room do I actually have left” question concrete, and it’s worth checking every time your buffer is thin.
This is exactly where continuous, broker-side enforcement earns its keep. Because Shibiki syncs your MetaTrader positions and pushes hard risk limits down to the broker, a size that would blow past your remaining drawdown gets caught before it’s on — not after a Monday gap has already breached you. The rule holds even when you’re not watching the screen, which is the whole point of a limit you can’t hold through the weekend.
Related: Position Size Calculator · Prop-Firm Drawdown Calculator · MetaTrader integration