That looks more like gambling if you ask me. you have to learn how to draw a simple trend line, the blue one looks right, but the lower line that will function as support in the trend channel, dont have much support. In a bullish trend you should draw a support line that binds the bottoms, in a bearish market you draw a line that binds the tops together "just as you did with here, with the blue line". When you get these lines right, you can go on and make a correct trand channel.