Drawing Tools can be applied, moved, and formatted, directly on a chart, providing tremendous flexibility. Many drawing tools allow you to analyze new data on a chart by extending the drawing object to the left or to the right of the chart. You can use them to call attention to any area of a chart you wish.
One of the basis analytic charting tools for detecting the principal trend. MultiCharts supports 4 types of trend lines: FreeStyle, Extreme, Fixed Point, Regression.
With the Trend line one can estimate the strength as well as possible trend reversal points. Trend lines can help You to identify trend breakouts, also they allow you to easily visualize market price tendency. Usually traders draw several Trendlines on a chart track market movements.