The Double Browns Exponential Smoother (DBES) is a trend-following indicator that reduces the lag present in other moving averages by using a double exponential smoothing technique. It takes in the source data and a smoothing factor as input and produces a smoothed version of the source data. The DBES is then calculated as the difference between twice the output of the first smoothing calculation and the output of the second smoothing calculation. The DEMA is useful for traders looking to identify trends in the markets.