TRIX   

TRIX is a momentum indicator that displays the percent rate-of-change of a triple exponentially smoothed moving average of the instrument’s closing price. It is designed to keep you in trends equal to or shorter than the number of periods you specify.

Usage:
The TRIX indicator oscillates around a zero line. Its triple exponential smoothing is designed to filter out insignificant cycles. Trades should be placed when the indicator changes direction (i.e., buy when it turns up and sell when it turns down).  The TRIX can also help identify turning points. The simplest rule of trading decisions making while following the trend: to buy, when TRIX changes direction from decreasing one to incising. And to sell, when TRIX changes direction from incising one to decreasing.