anchor.diff:          }
         ],
         "is_valid_query": false,
  +      "tile_def": {
  +        "autoscale": false,
  +        "custom_unit": "%",
  +        "text_align": "center",
  +        "precision": 0,
  +        "viz": "query_value",
  +        "requests": [
  +          {
  +            "q": "( (avg:bosh.healthmonitor.system.healthy{deployment:<%= deployment %>,job:router_z1}.rollup(avg,60)) + (avg:bosh.healthmonitor.system.healthy{deployment:<%= deployment %>,job:router_z2}.rollup(avg,60)) ) *50",
  +            "aggregator": "min",
  +            "conditional_formats": [
  +              {
  +                "invert": false,
  +                "comparator": "<",
  +                "value": 100,
  +                "palette": "white_on_red"
  +              },
  +              {
  +                "invert": false,
  +                "comparator": ">=",
  +                "value": 100,
  +                "palette": "white_on_green"
  +              }
  +            ]
  +          }
  +        ]
  +      },
         "res_calc_func": "raw",
         "aggr": "avg",
         "y": 6.9950815836588545,
  
positive.code:         }
        ],
        "is_valid_query": false,
        "res_calc_func": "raw",
        "aggr": "avg",
        "y": 11,
  
negative.code:     },
      {
        "metric": "bosh.healthmonitor.system.disk.ephemeral.percent",
        "text_align": "center",
        "query": "max:bosh.healthmonitor.system.disk.ephemeral.percent{deployment:concourse}",
        "text_size": "auto",
        "title_size": 16,
        "title": true,
        "aggregator": "max",
        "title_align": "left",
        "custom_unit": "%",
        "width": 19,
        "timeframe": "1h",
        "wrapped": true,
  