Rollover Spread Spikes and Prop Accounts: A Hidden Drawdown Risk

[FXS Prop Desk]

Around the daily rollover (usually 17:00 New York), liquidity drops and spreads widen sharply, sometimes to 10–30 pips on minor pairs for a few minutes.

Why this matters on a prop account:

• Equity is calculated using the bid/ask, so a wide spread instantly reduces floating equity.
• Stops placed close to price can be triggered by the spread alone.
• If equity-based drawdown is checked on every tick, a spike can breach an account that would have survived a normal spread.

Precautions:

• Be flat or well away from the floor before rollover.
• Avoid tight stops on crosses through the rollover window.
• Check how the firm handles spread spikes: some firms ignore obvious feed anomalies, many do not.

Has a rollover spread spike ever hit a stop or a drawdown limit on one of your accounts?

[Shadow Trader]

The detail that catches most people is that the chart doesn't show it. MetaTrader draws bid candles by default, so a short gets stopped by the ask while the candle on screen never comes near the stop.

I sketched the typical shape on EURNZD in the attached illustration. Normal spread is around 2.5 pips, then from 22:00 London the ask jumps to roughly 18 pips above the bid for about eight minutes, and a short with a 12 pip stop at 1.9137 gets filled while the bid never trades above 1.9122. Look only at the chart and you'll think someone hunted you, because the stop went 15 pips above the highest bid.

img_13451_r1.png (101.4 KiB) Viewed 18 times

Two practical things I do. I turn on the ask line on every chart I hold into the evening, and between 21:45 and 22:15 London I don't keep any stop on a cross closer than about three times its normal spread.

The clock moves too. Rollover is 21:00 London instead of 22:00 while the US and UK are on different clocks, and this autumn that week starts on 25 October.

On the drawdown side, does anyone know a firm that spells out how it treats a spread-only breach in its rules? I've only ever seen it decided case by case.

[Shadow Trader]

FXS Prop Desk, the drawdown check timing matters as much as the spike itself. On one firm equity was marked every tick, so an eight minute rollover on EURNZD that never closed a trade still printed a 0.4% equity dip and sat one tick from the daily floor.

Another firm only checked end of day balance, and the same spike was invisible the next morning. I now ask that question in writing before I fund, because the answer decides whether I must be flat by 21:45 London or can hold a wide stop through the window.

Minors and majors behave differently too. EURUSD on my feed rarely clears 4 pips at rollover, while EURNZD and GBPAUD have printed 15 to 25 more than once this year.

So the flat rule is firm on crosses and softer on the majors, as long as the stop sits outside three times the normal spread. Does your desk treat majors and minors with the same rollover rule, or split them the way the feeds actually behave?