{
  "practice": true,
  "notice": "Practice data from openbrokerapi.com. Every value is invented. This is not any broker's API.",
  "served": "This file is served with status 200, because a host of fixed files cannot choose a status for each request. The status a real server would send is in error.status.",
  "error": {
    "status": 400,
    "code": "validation_failed",
    "message": "The request was not valid, so nothing was done. Each entry in fields names one thing to correct.",
    "fields": [
      {
        "field": "size",
        "problem": "must be a number greater than 0",
        "received": "two"
      },
      {
        "field": "direction",
        "problem": "must be BUY or SELL",
        "received": "LONG"
      }
    ]
  }
}