Can you help me respond to this students post in a discussion board Trendlines are the trends which draw over pivot highs or under pivot lows to show the prevailing direction or show some data's best fit. Trendlines are a visual representation of a picture of the trend. In investment, we could use trendlines to illustrate the prevailing direction of price. Therefore, trendlines are associated with financial analysts. There are many different trendlines, such as linear, logarithmic, polynomial, power, exponential and moving average. A trendline helps technical analysts determine the current direction of market prices. Except that, trendlines can be used to predict areas of support and resistance which help identify beyond the price where may have a difficult time moving. This information will benefit traders looking for strategic entry levels or effectively manage risk by placing stop-loss orders. R-squared (R2 or the coefficient of determination) is a statistical measure of a regression model which shows the proportion of variance in the dependent variable that can be explained by the independent variable. R-squared shows how well the data fit the regression model (the goodness of fit). To tell the reliability of a trendline, it depends on its R-squared value is close to or at 1. To find out whether a trendline is strong, we could find whether it has some characteristics such as highs or lows trending (swings), or most of the bars in the direction of the trend. In sum, trendline analysis is a way to look at the overall direction of the observed behavior as depicted through a trendline. Trendlines can depict an increasing/decreasing rate of progress and a zero trend (flat rate)