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.