Working out formulas for charting is so difficult. But at the same time if feels good to push your brain to think. Must release feel good chemicals . I have 2 degrees and a diploma , but none of those required as much thinking as charting . Once your brain experiences that deep level of thought , you actually want more of it - a bit like exercising perhaps -. The best I can do is discover one piece of the puzzle at a time -fully knowing that there are still about 50 yet to discover . And each piece is very difficult , and needs to be searched for . Charting requires patience, and grace towards yourself - accepting that you can only learn so much in a day - it is a marathon. Determination is crucial if you are to make it to the finish line .