TThe US dollar index had some volatile moves after the US Federal Reserve left the key rate unchanged, but (in a technical view), the USDX did a pullback at the 200 SMA (H1 chart). This could give us a bearish scenario for coming days, but bear in mind that the support level of 98.72 still doesn't gets broken. That inflection area, as you can check on the January 14 and January 21. The MACD indicator remains weak in the positive territory, but still supports the overall bullish idea.

H1 chart's resistance levels: 99.22 / 99.49

H1 chart's support levels: 98.97 / 98.72

Trading recommendations for today: Based on the H1 chart, place buy (long) orders only if the USDX breaks with a bullish candlestick; the resistance level is seen at 99.22, take profit is at 99.49, and stop loss is at 98.95.