\donttest{
if (!requireNamespace("ggplot2", quietly = TRUE)) utils::install.packages(
  "ggplot2", repos = "https://cloud.r-project.org", quiet = TRUE
)

ggplot2::ggplot(bitcoin, ggplot2::aes(x = date, y = price)) +
  ggplot2::geom_line()

result <- suppressWarnings(
  fastcpd.garch(diff(log(bitcoin$price[200:500])), c(1, 1))
)
summary(result)
bitcoin$date[result@cp_set + 200]
plot(result)
}