Zerolag (almost) EMA gives a good indicator of "close" trend. Many are familiar with the fast/slow ema crossing strategy. Try using this zerolag_ema as the fast runner. You will see improved and more reliable crossovers..
In general, when the zero_lag ema is above the EMA the instrument is in a bull mode and when the zero_lag ema is below the EMA the stock is bearish.