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Sunday candles and the sixth daily bar on some brokers

Not every broker draws the same daily candles. If your broker's server runs on GMT or UTC rather than on New York close time, you'll get a small extra daily bar every week covering the Sunday evening open. Five trading days, six daily candles.

That little Sunday bar causes more problems than it looks.

It changes Monday's candle. Part of the early Asian session on Monday ends up in the Sunday bar, so Monday's high, low and open are different from what a New York close broker shows.

It messes with indicators. A 20 period moving average on D1 covers fewer real trading days if one in six bars is a stub. ATR on the daily chart gets dragged down by the tiny Sunday range.

It shifts the levels people trade. If you mark the previous day high and low on Monday, you might be marking the Sunday stub instead of Friday, which is almost never what you want.

Most brokers aimed at FX traders use a server time where the day starts at 17:00 New York, usually GMT plus two or three. That gives five clean daily bars. If yours doesn't, it's not necessarily a bad broker, but you need to know.

The quick check is to open the daily chart and look for a small candle at the start of each week.

TradingView handles this differently depending on the data source you pick. Some feeds draw daily bars on New York close, others on UTC midnight, and the session settings in the symbol info show which one you're seeing. If you plan on TradingView and execute on MT5, make sure both are using the same daily session. Otherwise your levels from TradingView won't match the candles on your broker's chart, and a previous day high might be a few pips different between the two, which matters for a scalper placing entries and stops right at those levels. A quick check of the session settings removes the doubt.

Weekly candles have a version of the same issue. With a UTC server, the weekly bar may start at Sunday evening's open or at midnight, which changes the weekly open price. Traders who use the weekly open as a reference level can end up with a different number from everyone else on a New York close broker. It's a small difference most weeks, but on a Monday with a big weekend gap it can be large, and the level you mark is not the level the rest of the market is watching. Comparing the weekly open on both charts takes seconds.

For EAs and backtests, the Sunday bar can break logic that assumes five bars per week. Code that looks back one daily bar to get yesterday's high will grab the Sunday stub on Mondays. A fix is to skip daily bars with very small ranges or to check the day of week of the bar before using it. Better still, build your own daily bars from M1 data on a 17:00 New York boundary, so the logic never depends on how the broker's server time happens to be set. Building your own bars also makes backtests portable between brokers, since the logic no longer depends on one server setting.

Ask the broker what their server time is before opening an account if this matters to you. Many state it on their website or in the contract specifications, and support can tell you in a sentence. If you already trade with a broker that draws Sunday bars and you like them otherwise, there's no need to move. Just mark your daily levels from a chart or tool that uses New York close, and keep the broker chart for execution only. That split between planning charts and execution charts suits a lot of scalpers anyway, and it removes the mismatch for good.

The daily close has the same problem, and it matters more for anyone who trades the Asian session. With a New York close broker the daily candle starts at 17:00 New York, so the Asian session sits at the start of the new day. With a UTC server, the start of the bar lands in the middle of the Tokyo morning, and the open, high and low of the day can be quite different. Levels drawn from the previous day's high and low then differ from what most of the market sees, especially for USDJPY and AUDUSD.

A daily chart on one platform doesn't look like a daily chart on another. The reason is the daily cut-off. Many MT4 brokers use GMT+2 or GMT+3, so the daily candle opens at midnight server time, which is 5pm New York. Other platforms use a 5pm New York cut with different DST handling, and some use midnight UTC.

The result is different highs, lows, and closes on what looks like the same day. A strategy that uses the daily high as a reference can produce different signals depending on the broker.

For scalping, the effect shows up with session opens. A level calculated from "yesterday's high" is meaningless if the candle that defines it spans different hours.

It matters even more for anything that uses fixed time rules. An entry rule like "trade after the 8:00 bar" fires at a different real-world time on different servers. After a daylight saving change, it shifts again.

The fix is to anchor everything to UTC or New York time and convert deliberately, rather than reading server times off the chart.

Has an off-by-one-hour server time mistake ever cost a trade? What happened?