The real author:
Trends indicate an important component of the market. You should certainly be able to define them.
However, it is not enough just to define the trend. It is also important to define the current trend direction. Although trends help us to earn more money in short periods of time, they also help "quickly" lose them, if your position is opened against the market. To avoid such situations the author developed a "trend continuation factor" (TCF). This indicator is created to determine the trend and its direction.
This indicator was first implemented in MQL4 and published in Code Base on 16.10.2007.
Fig.1 The TrendСontinuation indicator
Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/1579
The indicator of the first price change derivative or simply trend speed and sign.TrendStrength
The indicator to define the global trend.