Exponential moving averages (EMA) reduce the lag by depending more on recent prices. The weighting applied to the most recent price depends on the number of periods in the moving average (5, 10, 20, 50, 100, 200 etc.). The EMA calculation is done by several different steps. There is another popular moving average calculating - simple moving average (SMA). This page presents exponential moving average 10 (EMA10) for USD/IDR, meaning - there are 10 data points on which the EMA10 is based on. Using this indicator will assist you in trading the USD/IDR pair.