A stop-loss gives your trade a planned exit condition. It's easy to read the line on the chart as a promise about the final price, especially when ordinary trading conditions have made the difference seem small. A major news release can make that distinction much more visible.

The issue is execution. Prices available for trading can change quickly, spreads can widen and an order can fill somewhere other than its trigger level. Understanding that process helps you plan for the event without expecting the stop line to do a job it wasn't designed to do.

What can happen around a release

When economic data or a policy announcement arrives, participants process the information and adjust orders. An initial move may be followed by reversals, further repricing or a period of uneven trading. The sequence and timing vary; there isn't a dependable countdown from release to stable conditions.

For an open position, both the price movement and the available execution matter. For a new entry, the chart may show an attractive move while the spread and fill conditions make the actual trade very different. Reviewing the candle afterward doesn't recreate those conditions.

A stop trigger is not the fill

We love to treat lines on a chart as absolute promises, but a stop-loss is just an instruction, not a guarantee. In a fast move, the market can pass through prices without an executable quote being available to your order at each one.

Consider a hypothetical long position with a stop at 1.0850. Price moves from 1.0870 to 1.0820, and the next available execution price in this example is 1.0820:

1. The move through 1.0850 triggers the stop.

2. The order is submitted for execution under its terms.

3. It fills at 1.0820, which is 30 pips below the intended stop level.

The Mechanism: When major data drops, liquidity can thin out and prices jump. If your stop at 1.0850 is triggered during a fast move, your broker doesn't magically pause the market at your exact price.

Negative Slippage: The order executes at the next available price, which might be 1.0820, leaving you with unexpected extra slippage.

Schematic repricing example, without a price or time scale.

The visual shows a planned stop level, a trigger and a lower actual fill. The difference between trigger and fill illustrates negative slippage for this position. It has no price or time scale, so use it to understand the relationship rather than to estimate a particular gap.

A fill can also be better than the reference price, sometimes called positive slippage or price improvement. The important point is that a standard stop's trigger and execution price are different parts of the process. Guaranteed stops, where available, have their own eligibility, costs and terms to inspect.

Why the spread matters

The bid-ask spread is the price of admission, and it hates uncertainty. Around high-impact news, that spread can widen drastically (e.g., jumping from a fraction of a pip to 15–20 pips). That sudden widening changes your entry and exit costs instantly and can trigger stops earlier or harsher than expected.

For an arithmetic illustration, a spread of 0.5 pips widening to 15–20 pips is a 30–40-fold increase in the spread component. Those figures are hypothetical, not a normal range to assume for your broker or event. Other costs and slippage remain separate considerations.

A wider spread doesn't translate into one fixed amount of additional slippage. The order type, trigger rules and available prices all matter. Check how your platform displays bid and ask so you can interpret an execution against the relevant side of the quote.

Three ways traders manage scheduled news

Instead of crossing your fingers and hoping the market respects your risk parameters, you generally have three plays:

• Close Before the Event: Once the position is closed, it is no longer exposed to the release. Closing the position still involves execution conditions and trading costs. You give up any continuation move, but you keep your sanity.

• Reduce Exposure: Lower your position size. It doesn't eliminate gap risk entirely, but it cushions the blow if the market decides to violently reprice.

• Wait for the Post-Release Setup: Let the initial shockwave pass. Watch how price reacts, let the spread settle, and enter after there's actual structural evidence rather than chasing a chaotic candle.

Build news awareness into the routine

Check the economic calendar before your session starts, match up your time zones, and decide ahead of time which open positions are walking into the line of fire. The calendar is one browser tab that can earn its place by giving you a reason to do less.

After the event, review what actually happened: price behavior, spread, trigger and fill. If you are considering another entry, assess the current conditions and your setup rules. Don't assume that the original plan becomes valid again just because a familiar waiting period has passed.