you need to normalize data to its underlying scaling pattern, or you can't see the patterns in the visualisation

a circle looks like a line with a big enough coefficient compared to the area under the plot, that's the point... a circle is a line, in a partial higher dimension, and same goes for two dimensional statistical data comparing two variables (time and price in this case) - patterns appear in a cluster of data when you normalize it

it's not saying the graph is the normal pattern, necessarily, but if you find a good curve fit it is often predictive