The original trend indicator. The indicator draws three lines in a separate window that characterize the current price dynamics. It can take values from -1 to 1.
The closer the indicator value is to 1, the stronger the uptrend. Than
the closer to -1, the stronger the downtrend. It can also be used as an
oscillator to determine overbought/oversold conditions. The indicator
has one input parameter Period, which specifies the number of
bars used for calculation.