Check and see how going from one corner of a square to a 1/2 square, 1 square, 1.5 square. Gann does a similar idea with his angle 1/1, 2/1 etc., except in this case your using the squares of the grid as a reference. This doesn't mean this is set up perfectly, but the grid should give the angles that occur on the chart...usually incremented angles eg. 15, 30, 45, 60. get the idea. That doesn't mean those angles work here. I am just giving an example. If you have any better solutions give me a note.