"The best trend indicator is when you print the chart, put it on the wall and take a few steps back. If you now can identify the trend you're done!"
This is an attempt of doing the same thing...
I find it handy to switch the color of the trendline depending on the where the Trend is going. Especially when zooming in on the chart, the color tells you what the overall Trend is.
Trendline deluxe comes with an extra twist in that it can be colored according to your Stock index of choice, but still be plotted according to the Stock at hand.