I set up my charts with F11 on. You may need to back the zoom off minus once.
I made a good prediction both up and down with the difference between top and bottom cycles before. What you want to look for is an arc swing from one center that would connect 2 legs of an arc when setting up top and bottom cycles. To make a chart show right diagonals I UNlock the scales and set up a RECTANGLE because it has a perfect 90 degree angle on it. I adjust the scale until the diagonals become 90 or perpendicular to each other. Diagonals are the MOST accurate method I have found for accuracy. They don't always work...but when they do...they can be deadly accurate. Right angles and right diagonals go together on the same scaling often. The channel method I use is accurate also, but it's difficult to get a good lead point to determine the channel angle. Arcs and diagonals are my 2 favorite methods.
I made a good prediction both up and down with the difference between top and bottom cycles before. What you want to look for is an arc swing from one center that would connect 2 legs of an arc when setting up top and bottom cycles. To make a chart show right diagonals I UNlock the scales and set up a RECTANGLE because it has a perfect 90 degree angle on it. I adjust the scale until the diagonals become 90 or perpendicular to each other. Diagonals are the MOST accurate method I have found for accuracy. They don't always work...but when they do...they can be deadly accurate. Right angles and right diagonals go together on the same scaling often. The channel method I use is accurate also, but it's difficult to get a good lead point to determine the channel angle. Arcs and diagonals are my 2 favorite methods.