Fibonacci Arcs are built as follows: first, the trend line is drawn between two extreme points, for example, from the trough to the opposing peak. Then three arcs are built having their centers in the second extreme point and intersecting the trend line at Fibonacci levels of 38.2, 50, and 61.8 per cent.
Fibonacci arcs are considered to be potential support and resistance levels. Fibonacci Arcs and Fibonacci Fans are usually plotted together on the chart, and support and resistance levels are determined by the points of intersection of these lines.
It should be noted that the points of intersection of Arcs and the price curve can change depending on the chart scale since an arc is a part of a circumference, and its form is always the same.