The Personal Consumption Expenditure (PCE) Prices release measures the changes in the price of goods and services purchased by consumers for the purpose of consumption. Prices are weighted according to total expenditure per item. It measures price change from the perspective of the consumer. It is a key way to measure changes in purchasing trends and inflation.
A higher than expected reading should be taken as positive/bullish for the USD, while a lower than expected reading should be taken as negative/bearish for the USD.