RPI Index (Retail Price Index) determines price change levels for consumer goods basket. It serves as an inflation level index without taking into account interest rate payments for credit loans for obtaining real estate property (RPI-X). RPI UK Index, calculated for comparison with analogous indices in other countries is referred to as harmonized. If the rate growth of this indicator is higher than the planned value, then the Bank of England increases interest rates. UK Retail Price Index has significant online forex market influence. The data is published in the third decade of each month.