How to use multiple parameters in swarming

[Michael Lam]

Hi,

I have been trying to use multiple parameters based on the hot gym tutorial
with some modifications, such as added an extra included field:

SWARM_DESCRIPTION = {
  "includedFields": [
    {
      "fieldName": "timestamp",
      "fieldType": "datetime"
    },
    {
      "fieldName": "price",
      "fieldType": "float",
      "maxValue": 1000.0,
      "minValue": 0.0
    },
    {
      "fieldName": "trend",
      "fieldType": "float",
      "maxValue": 20.0,
      "minValue": -20.0
    }
  ],

notice I added "trend" in addition to "price", but after swarming, the
resulting params.csv file only has time and price in it, no trend.  Can
someone tell me what I am doing wrong?  Thanks.