diff --git a/platform/features/layout/test/FixedControllerSpec.js b/platform/features/layout/test/FixedControllerSpec.js
index 31d5e06659..90a397f374 100644
--- a/platform/features/layout/test/FixedControllerSpec.js
+++ b/platform/features/layout/test/FixedControllerSpec.js
@@ -423,6 +423,42 @@ define(
                 // Style should have been updated
                 expect(controller.selected().style).not.toEqual(oldStyle);
             });
+
+            it("reflects limit status", function () {
+                var elements;
+
+                mockHandle.getDatum.andReturn({});
+                mockHandle.getTelemetryObjects().forEach(function (mockObject) {
+                    var id = mockObject.getId(),
+                        mockLimitCapability =
+                            jasmine.createSpyObj('limit-' + id, ['evaluate']);
+
+                    mockObject.getCapability.andCallFake(function (key) {
+                        return (key === 'limit') && mockLimitCapability;
+                    });
+
+                    mockLimitCapability.evaluate
+                        .andReturn({ cssClass: 'alarm-' + id });
+                });
+
+                // Initialize
+                mockScope.domainObject = mockDomainObject;
+                mockScope.model = testModel;
+                findWatch("domainObject")(mockDomainObject);
+                findWatch("model.modified")(1);
+                findWatch("model.composition")(mockScope.model.composition);
+
+                // Invoke the subscription callback
+                mockHandler.handle.mostRecentCall.args[1]();
+
+                // Get elements that controller is now exposing
+                elements = controller.getElements();
+
+                // Limit-based CSS classes should be available
+                expect(elements[0].cssClass).toEqual("alarm-a");
+                expect(elements[1].cssClass).toEqual("alarm-b");
+                expect(elements[2].cssClass).toEqual("alarm-c");
+            });
         });
     }
 );
diff --git a/platform/features/plot/test/PlotControllerSpec.js b/platform/features/plot/test/PlotControllerSpec.js
index 8edab2fc6d..d5100ab426 100644
--- a/platform/features/plot/test/PlotControllerSpec.js
+++ b/platform/features/plot/test/PlotControllerSpec.js
@@ -285,6 +285,33 @@ define(
                 fireWatch("axes[1].active.key", 'someNewKey');
                 expect(mockHandle.request.calls.length).toEqual(2);
             });
+
+            it("provides classes for legends based on limit state", function () {
+                var mockTelemetryObjects = mockHandle.getTelemetryObjects();
+
+                mockHandle.getDatum.andReturn({});
+                mockTelemetryObjects.forEach(function (mockObject, i) {
+                    var id = 'object-' + i,
+                        mockLimitCapability =
+                            jasmine.createSpyObj('limit-' + id, ['evaluate']);
+
+                    mockObject.getId.andReturn(id);
+                    mockObject.getCapability.andCallFake(function (key) {
+                        return (key === 'limit') && mockLimitCapability;
+                    });
+
+                    mockLimitCapability.evaluate
+                        .andReturn({ cssClass: 'alarm-' + id });
+                });
+
+                mockScope.$watch.mostRecentCall.args[1](mockDomainObject);
+                mockHandler.handle.mostRecentCall.args[1]();
+
+                mockTelemetryObjects.forEach(function (mockTelemetryObject) {
+                    expect(controller.getLegendClass(mockTelemetryObject))
+                        .toEqual('alarm-' + mockTelemetryObject.getId());
+                });
+            });
         });
     }
 );
diff --git a/platform/features/plot/test/elements/PlotLimitTrackerSpec.js b/platform/features/plot/test/elements/PlotLimitTrackerSpec.js
new file mode 100644
index 0000000000..1ba428115f
--- /dev/null
+++ b/platform/features/plot/test/elements/PlotLimitTrackerSpec.js
@@ -0,0 +1,103 @@
+/*****************************************************************************
+ * Open MCT Web, Copyright (c) 2014-2015, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT Web is licensed under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * Open MCT Web includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+/*global define,Promise,describe,it,expect,beforeEach,waitsFor,jasmine*/
+
+define(
+    ["../../src/elements/PlotLimitTracker"],
+    function (PlotLimitTracker) {
+        "use strict";
+
+        describe("A plot's limit tracker", function () {
+            var mockHandle,
+                testRange,
+                mockTelemetryObjects,
+                testData,
+                mockLimitCapabilities,
+                tracker;
+
+            beforeEach(function () {
+                testRange = "some-range";
+                testData = {};
+                mockHandle = jasmine.createSpyObj(
+                    'handle',
+                    ['getTelemetryObjects', 'getDatum']
+                );
+                mockTelemetryObjects = ['a', 'b', 'c'].map(function (id, i) {
+                    var mockTelemetryObject = jasmine.createSpyObj(
+                            'object-' + id,
+                            [ 'getId', 'getCapability', 'getModel' ]
+                        ),
+                        mockLimitCapability = jasmine.createSpyObj(
+                            'limit-' + id,
+                            [ 'evaluate' ]
+                        );
+                    testData[id] = { id: id, value: i };
+                    mockTelemetryObject.getId.andReturn(id);
+                    mockTelemetryObject.getCapability.andCallFake(function (key) {
+                        return key === 'limit' && mockLimitCapability;
+                    });
+                    mockLimitCapability.evaluate
+                        .andReturn({ cssClass: 'alarm-' + id});
+                    return mockTelemetryObject;
+                });
+                mockHandle.getTelemetryObjects.andReturn(mockTelemetryObjects);
+                mockHandle.getDatum.andCallFake(function (telemetryObject) {
+                    return testData[telemetryObject.getId()];
+                });
+
+                tracker = new PlotLimitTracker(mockHandle, testRange);
+            });
+
+            it("initially provides no limit state", function () {
+                mockTelemetryObjects.forEach(function (mockTelemetryObject) {
+                    expect(tracker.getLegendClass(mockTelemetryObject))
+                        .toBeUndefined();
+                });
+            });
+
+            describe("when asked to update", function () {
+                beforeEach(function () {
+                    tracker.update();
+                });
+
+                it("evaluates limits using the limit capability", function () {
+                    mockTelemetryObjects.forEach(function (mockTelemetryObject) {
+                        var id = mockTelemetryObject.getId(),
+                            mockLimit =
+                                mockTelemetryObject.getCapability('limit');
+                        expect(mockLimit.evaluate)
+                            .toHaveBeenCalledWith(testData[id], testRange);
+                    });
+                });
+
+                it("exposes legend classes returned by the limit capability", function () {
+                    mockTelemetryObjects.forEach(function (mockTelemetryObject) {
+                        var id = mockTelemetryObject.getId();
+                        expect(tracker.getLegendClass(mockTelemetryObject))
+                            .toEqual('alarm-' + id);
+                    });
+                });
+            });
+
+        });
+    }
+);
diff --git a/platform/features/plot/test/suite.json b/platform/features/plot/test/suite.json
index 92dfcb1e8a..cec8798d77 100644
--- a/platform/features/plot/test/suite.json
+++ b/platform/features/plot/test/suite.json
@@ -6,6 +6,7 @@
     "SubPlot",
     "SubPlotFactory",
     "elements/PlotAxis",
+    "elements/PlotLimitTracker",
     "elements/PlotLine",
     "elements/PlotLineBuffer",
     "elements/PlotPalette",
diff --git a/platform/telemetry/test/TelemetrySubscriptionSpec.js b/platform/telemetry/test/TelemetrySubscriptionSpec.js
index 1715504b6e..e179a76bff 100644
--- a/platform/telemetry/test/TelemetrySubscriptionSpec.js
+++ b/platform/telemetry/test/TelemetrySubscriptionSpec.js
@@ -243,6 +243,26 @@ define(
                 subscription.unsubscribe();
                 expect(mockUnlisten).toHaveBeenCalled();
             });
+
+            it("provides telemetry as datum objects", function () {
+                var testDatum = { a: 1, b: 13, c: 42, d: -1977 };
+
+                function lookup(index, key) {
+                    return testDatum[key];
+                }
+
+                mockSeries.getDomainValue.andCallFake(lookup);
+                mockSeries.getRangeValue.andCallFake(lookup);
+
+                testMetadata.domains = [ { key: 'a' }, { key: 'b'} ];
+                testMetadata.ranges = [ { key: 'c' }, { key: 'd'} ];
+
+                mockTelemetry.subscribe.mostRecentCall.args[0](mockSeries);
+                mockTimeout.mostRecentCall.args[0]();
+
+                expect(subscription.getDatum(mockDomainObject))
+                    .toEqual(testDatum);
+            });
         });
     }
 );