Why do you need to "copy" it? Anybody can see when something is trending. The trick is knowing when the trend will end. Look at $SHOT. It was trending hard for 2 weeks then the rug got pulled on wednesday. Now the longs are in a bad way if they jumped in to the trend late.
There are some methods that use a copied trendline/range. Like one of my favorites, mirror foldback. Here's another method that uses copied lines from the below book. It works (sometimes).