Hi Goyal ji,
SG Sir has not yet discussed the concepts and even I am unaware about the same.... So, whatever I am going to write now might prove to be totally wrong.... You are bewared...
First of all, look for symmetry on both the sides of lines for drawing the equilibrium line..... Once you are convinced about your equilibrium line, look for a Swing High/Swing Low and draw a Straight Line bisecting your equilibrium line at the middle and extend it on the other side for targets.....
Observe the various charts posted, and you should get the feel on how to go about it...