An index that measures the US dollar against a basket of six major currencies — the headline gauge of dollar strength.
The DXY (US Dollar Index) measures the dollar against a weighted basket of six currencies: euro (57.6%), yen (13.6%), pound (11.9%), Canadian dollar (9.1%), Swedish krona (4.2%), and Swiss franc (3.6%). The euro dominates the calculation, which means DXY is essentially "USD vs EUR" with some other currencies sprinkled in.
DXY is the most-watched single number for US dollar direction. When DXY rises, the dollar is generally strengthening across the board. When it falls, the dollar is weakening. Traders use DXY as a quick filter — "is the dollar bid today?" — before deciding which pairs to trade.
Because DXY is so euro-heavy, EUR/USD and DXY are almost mirror images. They move with about -0.95 correlation. If you're long DXY, you're effectively short EUR/USD. If you're long EUR/USD, you're short DXY. The two are different ways of expressing the same trade.
DXY rallied from 95 to 114 between January and September 2022 — a 20% move that crushed every USD-quoted pair. Traders watching DXY had a clear macro signal to short EUR/USD, GBP/USD, AUD/USD all year.
Frequently asked about dxy (us dollar index)
What is a dxy (us dollar index) in trading?+
An index that measures the US dollar against a basket of six major currencies — the headline gauge of dollar strength.
When will I see dxy (us dollar index) used in real trading?+
On every macro chart, every analyst report, every Bloomberg terminal. DXY is the dollar's headline ticker.
What is the most common mistake traders make with dxy (us dollar index)?+
Trading DXY directly without realizing it's effectively short EUR/USD. Most retail brokers don't quote DXY directly — they quote dollar pairs that are already inversely correlated with it.
What do experienced traders know about dxy (us dollar index) that beginners don't?+
Use DXY as your dollar-direction filter. Only take long EUR/USD trades when DXY is in a confirmed downtrend. Only take short EUR/USD when DXY is uptrending. This single rule cuts out 70% of bad trades.
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