diff --git a/js/beestat/runtime_sensor.js b/js/beestat/runtime_sensor.js
index 0f7232a..04aeac8 100644
--- a/js/beestat/runtime_sensor.js
+++ b/js/beestat/runtime_sensor.js
@@ -16,8 +16,6 @@ beestat.runtime_sensor.get_data = function(thermostat_id, range) {
     'metadata': {
       'series': {},
       'chart': {
-        'y_min': Infinity,
-        'y_max': -Infinity,
         'sensors': null
       }
     }
diff --git a/js/beestat/runtime_thermostat.js b/js/beestat/runtime_thermostat.js
index 9a69fe3..57f41a3 100644
--- a/js/beestat/runtime_thermostat.js
+++ b/js/beestat/runtime_thermostat.js
@@ -15,18 +15,7 @@ beestat.runtime_thermostat.get_data = function(thermostat_id, range) {
     'series': {},
     'metadata': {
       'series': {},
-      'chart': {
-        'y_min': Infinity,
-        'y_max': -Infinity
-      }
-    }
-  };
-
-  // A couple private helper functions for manipulating the min/max y values.
-  var y_min_max = function(value) {
-    if (value !== null) {
-      data.metadata.chart.y_min = Math.min(data.metadata.chart.y_min, value);
-      data.metadata.chart.y_max = Math.max(data.metadata.chart.y_max, value);
+      'chart': {}
     }
   };
 
@@ -185,7 +174,6 @@ beestat.runtime_thermostat.get_data = function(thermostat_id, range) {
       data.series.outdoor_temperature.push(outdoor_temperature_moving);
       data.metadata.series.outdoor_temperature.data[current_m.valueOf()] =
         beestat.temperature(runtime_thermostat.outdoor_temperature);
-      y_min_max(outdoor_temperature_moving);
       data.metadata.series.outdoor_temperature.active = true;
 
       var outdoor_humidity_moving = beestat.runtime_thermostat.get_average_(
@@ -211,7 +199,6 @@ beestat.runtime_thermostat.get_data = function(thermostat_id, range) {
       data.series.indoor_temperature.push(indoor_temperature);
       data.metadata.series.indoor_temperature.data[current_m.valueOf()] =
         indoor_temperature;
-      y_min_max(indoor_temperature);
       data.metadata.series.indoor_temperature.active = true;
 
       /**
@@ -228,9 +215,6 @@ beestat.runtime_thermostat.get_data = function(thermostat_id, range) {
         );
         data.series.setpoint_heat.push(setpoint_heat);
         data.metadata.series.setpoint_heat.data[current_m.valueOf()] = setpoint_heat;
-        y_min_max(outdoor_temperature_moving);
-
-        y_min_max(setpoint_heat);
 
         data.metadata.series.setpoint_heat.active = true;
 
@@ -247,7 +231,6 @@ beestat.runtime_thermostat.get_data = function(thermostat_id, range) {
         );
         data.series.setpoint_cool.push(setpoint_cool);
         data.metadata.series.setpoint_heat.data[current_m.valueOf()] = setpoint_cool;
-        y_min_max(setpoint_cool);
 
         data.metadata.series.setpoint_cool.active = true;
 
diff --git a/js/component/chart/runtime_thermostat_detail_temperature.js b/js/component/chart/runtime_thermostat_detail_temperature.js
index 0f68482..35925dd 100644
--- a/js/component/chart/runtime_thermostat_detail_temperature.js
+++ b/js/component/chart/runtime_thermostat_detail_temperature.js
@@ -121,35 +121,19 @@ beestat.component.chart.runtime_thermostat_detail_temperature.prototype.get_opti
  * @return {Array} The y-axis options.
  */
 beestat.component.chart.runtime_thermostat_detail_temperature.prototype.get_options_yAxis_ = function() {
-  /**
-   * Highcharts doesn't seem to respect axis behavior well so just overriding
-   * it completely here.
-   */
-
-  var y_min = Math.floor((this.data_.metadata.chart.y_min) / 10) * 10;
-  var y_max = Math.ceil((this.data_.metadata.chart.y_max) / 10) * 10;
-  var tick_positions = [];
-  var tick_interval = (beestat.setting('temperature_unit') === '°F') ? 10 : 5;
-  var current_tick_position =
-    Math.floor(y_min / tick_interval) * tick_interval;
-  while (current_tick_position <= y_max) {
-    tick_positions.push(current_tick_position);
-    current_tick_position += tick_interval;
-  }
-
   return [
     // Temperature
     {
       'gridLineColor': beestat.style.color.bluegray.light,
       'gridLineDashStyle': 'longdash',
+      'allowDecimals': false,
       'title': {'text': null},
       'labels': {
         'style': {'color': beestat.style.color.gray.base},
         'formatter': function() {
           return this.value + beestat.setting('temperature_unit');
         }
-      },
-      'tickPositions': tick_positions
+      }
     },
 
     // Humidity