Robert24
Short

EURUSD finding the scale and arc ratios

FX:EURUSD   Euro Fx/U.S. Dollar
196 0 1
Here's one way of finding the scale of a chart. I set four arrow tool lines together. 2 vertical and 2 horizontal by their coordinates in the format section. Then I place a circle so the arrows touch it at the top and bottom right (in the pic). I set the circle to the horizontal length first, then readjust the vertical arrow length. The fib speed arc always keeps a perfect circular arc, no matter what scale. When the arrows touch that perfect arc, then PRICE/BARS=SCALE.
So .16293/65 bars = .00250662 SCALE.
To calculate the angle farther back on the chart. .04370/24 bars = .00182083333. Now divide that by the scale OR multiply by the scale inverse...and you get .726411. This represents the real y/x for the tan ratio... and arctan or tan inverse = 36 degrees.
These red angle numbers show that you can't just apply any FAN setting to a chart. A 30 degree angle on one chart can be a 60 degree angle on another. Scale also makes a difference in the way the arcs hit 2 points at once. Draw a wedge from a center to a point and watch what happens to the other points that the arc touches. They move and don't fit the wedge. This is actually useful because with the proper scaling as in this chart...you can find consistent radius distance relations...and even when changing the overall wedge size, there is still a ratio relation between the arcs. ie. arc 1= .72 (usually .764) and arc 2 = 1 etc.
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