{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "A candlestick chart inspired by an example in Protovis (http://mbostock.github.io/protovis/ex/candlestick.html)",
  "background": "white",
  "padding": 5,
  "width": 400,
  "height": 200,
  "style": "cell",
  "data": [
    {
      "name": "source_0",
      "url": "data/ohlc.json",
      "format": {"type": "json", "parse": {"date": "date"}}
    },
    {
      "name": "data_0",
      "source": "source_0",
      "transform": [
        {
          "type": "filter",
          "expr": "(isDate(datum[\"date\"]) || (isValid(datum[\"date\"]) && isFinite(+datum[\"date\"]))) && isValid(datum[\"low\"]) && isFinite(+datum[\"low\"])"
        }
      ]
    },
    {
      "name": "data_1",
      "source": "source_0",
      "transform": [
        {
          "type": "filter",
          "expr": "(isDate(datum[\"date\"]) || (isValid(datum[\"date\"]) && isFinite(+datum[\"date\"]))) && isValid(datum[\"open\"]) && isFinite(+datum[\"open\"])"
        }
      ]
    }
  ],
  "marks": [
    {
      "name": "layer_0_marks",
      "type": "rule",
      "style": ["rule"],
      "from": {"data": "data_0"},
      "encode": {
        "update": {
          "stroke": [
            {"test": "datum.open < datum.close", "value": "#06982d"},
            {"value": "#ae1325"}
          ],
          "description": {
            "signal": "\"Date in 2009: \" + (timeFormat(datum[\"date\"], '%m/%d')) + \"; low: \" + (format(datum[\"low\"], \"\")) + \"; high: \" + (format(datum[\"high\"], \"\"))"
          },
          "x": {"scale": "x", "field": "date"},
          "y": {"scale": "y", "field": "low"},
          "y2": {"scale": "y", "field": "high"}
        }
      }
    },
    {
      "name": "layer_1_marks",
      "type": "rect",
      "style": ["bar"],
      "from": {"data": "data_1"},
      "encode": {
        "update": {
          "fill": [
            {"test": "datum.open < datum.close", "value": "#06982d"},
            {"value": "#ae1325"}
          ],
          "ariaRoleDescription": {"value": "bar"},
          "description": {
            "signal": "\"Date in 2009: \" + (timeFormat(datum[\"date\"], '%m/%d')) + \"; open: \" + (format(datum[\"open\"], \"\")) + \"; close: \" + (format(datum[\"close\"], \"\"))"
          },
          "xc": {"scale": "x", "field": "date"},
          "width": {"value": 5},
          "y": {"scale": "y", "field": "open"},
          "y2": {"scale": "y", "field": "close"}
        }
      }
    }
  ],
  "scales": [
    {
      "name": "x",
      "type": "time",
      "domain": {
        "fields": [
          {"data": "data_0", "field": "date"},
          {"data": "data_1", "field": "date"}
        ]
      },
      "range": [0, {"signal": "width"}],
      "padding": 5
    },
    {
      "name": "y",
      "type": "linear",
      "domain": {
        "fields": [
          {"data": "data_0", "field": "low"},
          {"data": "data_0", "field": "high"},
          {"data": "data_1", "field": "open"},
          {"data": "data_1", "field": "close"}
        ]
      },
      "range": [{"signal": "height"}, 0],
      "zero": false,
      "nice": true
    }
  ],
  "axes": [
    {
      "scale": "x",
      "orient": "bottom",
      "gridScale": "y",
      "grid": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "domain": false,
      "labels": false,
      "aria": false,
      "maxExtent": 0,
      "minExtent": 0,
      "ticks": false,
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "gridScale": "x",
      "grid": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "domain": false,
      "labels": false,
      "aria": false,
      "maxExtent": 0,
      "minExtent": 0,
      "ticks": false,
      "zindex": 0
    },
    {
      "scale": "x",
      "orient": "bottom",
      "grid": false,
      "title": "Date in 2009",
      "format": "%m/%d",
      "labelAngle": 315,
      "labelAlign": "right",
      "labelBaseline": "top",
      "labelFlush": true,
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(width/40)"},
      "zindex": 0
    },
    {
      "scale": "y",
      "orient": "left",
      "grid": false,
      "title": "Price",
      "labelOverlap": true,
      "tickCount": {"signal": "ceil(height/40)"},
      "zindex": 0
    }
  ]
}