Is Early Monday Morning Too Thin to Trade?

True — on movement.

The claim as it is usually statedEarly Monday specifically is thin and choppy before London opens.

Genuinely quieter in 15 of 19 markets. This is one of the few pieces of folklore that survives intact, though "quieter" is a statement about your position size, not about your odds.

What the data shows

Across 19 markets: direction: 5 of 19 markets differ beyond chance · movement: genuinely quieter in 16 of 19. Median movement in the window, 76% of a normal hour.

Market	In the window	Rest	z	Movement	Samples
NZD/USD	52.1%	49.3%	4.7	78% of normal	7,242
AUD/USD	51.6%	49.5%	3.6	80% of normal	8,047
USD/JPY	49.0%	50.9%	-2.9	76% of normal	6,391
ETH/USD	48.0%	50.2%	-2.3	101% of normal	2,877
USD/CAD	48.6%	49.8%	-2.2	62% of normal	8,302
GER40 (DAX)	50.0%	51.7%	-1.7	94% of normal	2,773

Strongest six by statistical strength, whichever way they point. z measures how far from chance a result sits — we treat |z| ≥ 3 as significant, and print it even when it is nowhere near.

Who says it

BrokerXplorer

How this was measured

Every claim here reduces to a window on the clock or the calendar, so it can simply be checked. We compare the claimed window against the rest of the week on 23 years of hourly data across 19 markets, measuring two separate things the folklore tends to conflate: direction (does the window close higher more often?) via a two-proportion z-test, and movement (is the average move bigger or smaller?). A window can be perfectly ordinary in direction and genuinely quieter in movement — saying which is the entire point.

The bar here is |z| ≥ 2, deliberately more lenient than the |z| ≥ 3 this site applies to its own numbers: when testing someone else's claim, failing to reject it even at a lenient bar is the stronger statement.

Check any hour yourself →

Free on the four major pairs, with the full 23 years and the sample size on every number.