In the United States, the Inflation Rate YoY measures the percentage change in consumer prices compared with the same period one year earlier. This indicator reflects changes in the cost of a market basket of goods and services, including food, energy, and various services, and is used to assess inflationary trends and purchasing power.
A higher than expected figure should be seen as positive (bullish) for the USD while a lower than expected figure should be seen as negative (bearish) for the USD.