what is · intermediate
What Is the DXY? (The Dollar Index Every Forex Trader Should Watch)
The DXY is the master tide of forex. When you understand what it's doing, every individual pair starts making more sense — most of the moves you're seeing are just the dollar pulling everything else around.
The DXY (US Dollar Index) is a single number that measures the value of the US dollar against a weighted basket of six major currencies: the euro (57.6%), the Japanese yen (13.6%), the British pound (11.9%), the Canadian dollar (9.1%), the Swedish krona (4.2%), and the Swiss franc (3.6%). It was created in 1973 right after the gold standard ended, and it's been the standard measure of dollar strength ever since. The base value is 100, so any DXY reading above 100 means the dollar is stronger than its 1973 baseline.
Why this matters: forex pairs are relative. EUR/USD going up could mean the euro got stronger, or it could mean the dollar got weaker. From the EUR/USD chart alone, you can't tell. Pulling up the DXY alongside it answers the question instantly. If DXY is dropping at the same time EUR/USD is rising, the move is dollar-driven (the dollar is getting weak across the board). If DXY is flat or rising, the move is euro-driven (something specifically bullish is happening to the euro). Same chart pattern, totally different interpretation, totally different trading implications.
What moves the DXY: US interest rates, US economic data (CPI, NFP, retail sales, GDP), Federal Reserve policy decisions, risk-on/risk-off sentiment in global markets, and major geopolitical events. When the Fed hikes rates, DXY tends to go up because higher rates make the dollar more attractive to hold. When risk assets crash globally (like during COVID or a banking crisis), the dollar usually rallies because investors flee to it as a safe haven. When the US economy looks weak relative to Europe or Japan, the dollar drops.
The practical use for retail traders. Before taking any trade on a USD pair (which is most of forex), check the DXY. If you're considering shorting EUR/USD, the trade is much higher probability if DXY is in an uptrend or breaking out — you're aligned with the dollar's broader trend. If DXY is dropping, your short is fighting the tide. The Candleread desk uses DXY as a filter: only take long-USD trades when DXY structure is bullish, only take short-USD trades when DXY structure is bearish. Half your trades evaporate, but the half that remain have meaningfully better odds.
DXY doesn't predict every move perfectly — individual pairs can decouple based on local news (a Bank of Japan intervention can move USD/JPY against the broader DXY trend, for example). But on a longer timeframe, the DXY trend is the gravitational pull most pairs follow most of the time. Ignoring it is one of the biggest mistakes new forex traders make.
Key takeaways
- ✓DXY = US dollar measured against 6 major currencies (57.6% euro)
- ✓Base value of 100 = 1973 baseline; above 100 = stronger dollar
- ✓Use DXY to confirm whether moves are dollar-driven or pair-specific
- ✓Only take long-USD trades when DXY trend is bullish, vice versa
- ✓Pin DXY on your main chart layout — it's the master tide of forex
Frequently asked
Where can I see the DXY chart?+
TradingView (search "DXY" or "DX"), Investing.com, MetaTrader (some brokers offer it as a CFD), or Bloomberg. Free on TradingView and Investing.com. The Candleread desk recommends pinning DXY on your main chart layout as a permanent reference.
Does the DXY include the Mexican peso or Chinese yuan?+
No. The DXY basket was set in 1973 and hasn't been updated. It only includes EUR, JPY, GBP, CAD, SEK, CHF. There are alternative trade-weighted dollar indices that include China and Mexico, but for technical chart purposes, the DXY is still the standard.
How is the DXY weighted so heavily toward the euro?+
Because the euro replaced several European currencies that were originally in the basket (German mark, French franc, Italian lira). When they all merged into the euro in 1999, the combined weight stayed put — which is why the euro alone is 57.6% of the index.
Can I trade the DXY directly?+
Yes, through DXY futures (ICE), some broker CFDs on the DXY, or by trading dollar-based ETFs like UUP. Most retail traders use DXY as a confirmation tool rather than a tradeable instrument — the underlying pairs offer better liquidity and spreads.