When you enter a ticker symbol to get quote and chart, you may simply click on two points on the chart to draw your own trend lines.
Once you have a trend line, you may add parallel channel trend line by just clicking on a single point on the selected chart, followed by hitting the TAB key.
To clear all trendlines, you may hit the key DELETE.
BELOW ARE SOME STATIC EXAMPLES.
(Enter a symbol above to try it)