diff --git a/src/components/Discover/Map/Filter/Trace.vue b/src/components/Discover/Map/Filter/Trace.vue
index 16a97a8..1f6405b 100644
--- a/src/components/Discover/Map/Filter/Trace.vue
+++ b/src/components/Discover/Map/Filter/Trace.vue
@@ -168,9 +168,10 @@ export default {
     },
   },
   watch: {
-    selectArea: function(newValue) {
+    selectArea: function(newValue, oldValue) {
       let roundValue = Math.round(newValue[1].toFixed());
       if(newValue[1] !== roundValue) this.selectArea[1] = roundValue;
+      if(newValue != oldValue) this.$emit('filter-trace-selectArea', newValue); // 判斷 Apply 是否 disable
     },
     infinite404: function(newValue) {
       if(newValue === 404) this.infinitMaxItems = true;
diff --git a/src/components/Discover/Map/SidebarFilter.vue b/src/components/Discover/Map/SidebarFilter.vue
index 7f92634..00e9b67 100644
--- a/src/components/Discover/Map/SidebarFilter.vue
+++ b/src/components/Discover/Map/SidebarFilter.vue
@@ -87,7 +87,7 @@
           <!-- title: Attributes -->
           <Attributes v-if="selectValue[0] === 'Attributes'" @select-attribute="getSelectAttribute"></Attributes>
           <!-- title: Trace -->
-          <Trace v-if="selectValue[0] === 'Trace'" ref="filterTraceView"></Trace>
+          <Trace v-if="selectValue[0] === 'Trace'" ref="filterTraceView" @filter-trace-selectArea="selectTraceArea = $event"></Trace>
           <!-- title: Timeframes -->
           <Timeframes v-if="selectValue[0] === 'Timeframes'" :selectValue="selectValue"></Timeframes>
         </div>
@@ -96,7 +96,6 @@
         <div class="float-right space-x-4 px-4 py-2">
           <button type="button"  class="btn btn-sm btn-neutral" @click="reset">Clear</button>
           <button type="button" class="btn btn-sm" @click="submit" :disabled="isDisabledButton" :class="this.isDisabled ? 'btn-disable' : 'btn-neutral'">Apply</button>
-          <!-- :disabled="isDisabled" -->
         </div>
       </div>
     </div>
@@ -163,6 +162,7 @@ export default {
       isEndSelected: null,
       isActAllTask: true,
       rowData: [],
+      selectTraceArea: [], // Trace 滑快
       isDisabled: true, // Apply Button disabled setting
     }
   },
@@ -245,7 +245,7 @@ export default {
           }
           break;
         case 'Trace': // Filter Type 選 Trace 的行為
-          disabled = false;
+          if(this.selectTraceArea[0] !== this.selectTraceArea[1]) disabled = false;
           break;
         case 'Timeframes': // Filter Type 選 Timeframes 的行為
           if(this.selectTimeFrame.length > 0) disabled = false;