{
  "$schema": "urn:prism:schema:v1:spec",
  "title": "Net daily P&L",
  "data": {
    "values": [
      {"day": 1, "pnl": 12.4},
      {"day": 2, "pnl": -8.1},
      {"day": 3, "pnl": 4.7},
      {"day": 4, "pnl": -14.3},
      {"day": 5, "pnl": 19.2},
      {"day": 6, "pnl": 3.5},
      {"day": 7, "pnl": -2.0}
    ]
  },
  "mark": "area",
  "encoding": {
    "x": {"field": "day", "type": "quantitative"},
    "y": {"field": "pnl", "type": "quantitative"}
  }
}