Customise Candlestick Chart with Shapes and Annotations

Mix.install([
  {:plotly_ex, "~> 0.3"},
  {:kino, "~> 0.18"}
])

Section

layout.shapes and layout.annotations work on candlestick charts exactly as on scatter plots. A rect shape with xref: "x" and yref: "paper" highlights a date range across the full height of the chart. An annotation with xanchor: "right" labels the event.

alias Plotly.{Figure, Candlestick}

Figure.new()
|> Figure.add_trace(
  Candlestick.new(
    x: ["2017-01-17","2017-01-18","2017-01-19","2017-01-20","2017-01-23",
        "2017-01-24","2017-01-25","2017-01-26","2017-01-27","2017-01-30",
        "2017-01-31","2017-02-01","2017-02-02","2017-02-03","2017-02-06",
        "2017-02-07","2017-02-08","2017-02-09","2017-02-10"],
    open: [118.339996,120.0,119.400002,120.449997,120.0,
           119.550003,120.419998,121.669998,122.139999,120.93,
           121.150002,127.029999,127.980003,128.309998,129.130005,
           130.539993,131.350006,131.649994,132.460007],
    high: [120.239998,120.5,120.089996,120.449997,120.809998,
           120.099998,122.099998,122.440002,122.349998,121.629997,
           121.389999,130.490005,129.389999,129.190002,130.5,
           132.089996,132.220001,132.449997,132.940002],
    low: [118.220001,119.709999,119.370003,119.730003,119.769997,
          119.5,120.279999,121.599998,121.599998,120.660004,
          120.620003,127.010002,127.779999,128.160004,128.899994,
          130.449997,131.220001,131.119995,132.050003],
    close: [120.0,119.989998,119.779999,120.0,120.080002,
            119.970001,121.879997,121.940002,121.949997,121.629997,
            121.349998,128.75,128.529999,129.080002,130.289993,
            131.529999,132.039993,132.419998,132.119995],
    increasing: %{line: %{color: "#17BECF"}},
    decreasing: %{line: %{color: "#7F7F7F"}}
  )
)
|> Figure.update_layout(
  showlegend: false,
  xaxis: %{
    type: "date",
    title: %{text: "Date"},
    rangeslider: %{range: ["2017-01-17 12:00", "2017-02-10 12:00"]}
  },
  shapes: [%{
    type: "rect",
    xref: "x", yref: "paper",
    x0: "2017-01-31", y0: 0,
    x1: "2017-02-01", y1: 1,
    fillcolor: "#d3d3d3",
    opacity: 0.2,
    line: %{width: 0}
  }],
  annotations: [%{
    x: "2017-01-31",
    y: 0.9,
    xref: "x", yref: "paper",
    text: "largest movement",
    font: %{color: "magenta"},
    showarrow: true,
    xanchor: "right",
    ax: -20, ay: 0
  }]
)
|> Plotly.show()