what is a upward trendline
These lines are used to clearly show the trend and are also used in the identification of trend reversals. As you can see in Figure 5, an upward trendline is drawn at the lows of an upward trend. This line represents the support the stock has every time it moves from a high to a low.n other words, defining a trend goes well beyond the obvious. In any given chart, you will probably notice that prices do not tend to move in a straight line in any direction, but rather in a series of highs and lows. In technical analysis, it is the movement of the highs and lows that constitutes a trend.