diff --git a/src/components/OrderBook.vue b/src/components/OrderBook.vue
index 6410947..1a0c259 100644
--- a/src/components/OrderBook.vue
+++ b/src/components/OrderBook.vue
@@ -114,16 +114,22 @@ const bids = ref([
 setInterval(() => {
   // Update random ask price and shares
   const randomAskIndex = Math.floor(Math.random() * asks.value.length)
-  asks.value[randomAskIndex] = {
-    ...asks.value[randomAskIndex],
-    shares: Math.max(0, asks.value[randomAskIndex].shares + Math.floor(Math.random() * 100) - 50),
+  const askItem = asks.value[randomAskIndex]
+  if (askItem) {
+    asks.value[randomAskIndex] = {
+      price: askItem.price,
+      shares: Math.max(0, askItem.shares + Math.floor(Math.random() * 100) - 50),
+    }
   }
 
   // Update random bid price and shares
   const randomBidIndex = Math.floor(Math.random() * bids.value.length)
-  bids.value[randomBidIndex] = {
-    ...bids.value[randomBidIndex],
-    shares: Math.max(0, bids.value[randomBidIndex].shares + Math.floor(Math.random() * 100) - 50),
+  const bidItem = bids.value[randomBidIndex]
+  if (bidItem) {
+    bids.value[randomBidIndex] = {
+      price: bidItem.price,
+      shares: Math.max(0, bidItem.shares + Math.floor(Math.random() * 100) - 50),
+    }
   }
 
   // Update last price
diff --git a/src/views/TradeDetail.vue b/src/views/TradeDetail.vue
index 5371cb0..88c1839 100644
--- a/src/views/TradeDetail.vue
+++ b/src/views/TradeDetail.vue
@@ -45,6 +45,66 @@
         <v-card class="order-book-card" elevation="0" rounded="lg" style="margin-top: 32px">
           <OrderBook />
         </v-card>
+
+        <!-- Comments / Top Holders / Activity（与左侧图表、订单簿同宽） -->
+        <v-card class="activity-card" elevation="0" rounded="lg">
+          <v-tabs v-model="detailTab" class="detail-tabs" density="comfortable">
+            <v-tab value="comments">Comments</v-tab>
+            <v-tab value="holders">Top Holders</v-tab>
+            <v-tab value="activity">Activity</v-tab>
+          </v-tabs>
+          <v-window v-model="detailTab" class="detail-window">
+            <v-window-item value="comments" class="detail-pane">
+              <div class="placeholder-pane">No comments yet.</div>
+            </v-window-item>
+            <v-window-item value="holders" class="detail-pane">
+              <div class="placeholder-pane">Top holders will appear here.</div>
+            </v-window-item>
+            <v-window-item value="activity" class="detail-pane">
+              <div class="activity-toolbar">
+                <v-select
+                  v-model="activityMinAmount"
+                  :items="minAmountOptions"
+                  density="compact"
+                  hide-details
+                  variant="outlined"
+                  label="Min amount"
+                  class="min-amount-select"
+                />
+                <span class="live-badge">
+                  <span class="live-dot"></span>
+                  Live
+                </span>
+              </div>
+              <div class="activity-list">
+                <div
+                  v-for="item in filteredActivity"
+                  :key="item.id"
+                  class="activity-item"
+                >
+                  <div class="activity-avatar" :class="item.avatarClass">
+                    <img v-if="item.avatarUrl" :src="item.avatarUrl" :alt="item.user" class="avatar-img" />
+                  </div>
+                  <div class="activity-body">
+                    <span class="activity-user">{{ item.user }}</span>
+                    <span class="activity-action">{{ item.action }}</span>
+                    <span :class="['activity-amount', item.side === 'Yes' ? 'amount-yes' : 'amount-no']">
+                      {{ item.amount }} {{ item.side }}
+                    </span>
+                    <span class="activity-price">at {{ item.price }}</span>
+                    <span class="activity-total">({{ item.total }})</span>
+                  </div>
+                  <div class="activity-meta">
+                    <span class="activity-time">{{ formatTimeAgo(item.time) }}</span>
+                    <a href="#" class="activity-link" aria-label="View transaction" @click.prevent>
+                      <v-icon size="16">mdi-open-in-new</v-icon>
+                    </a>
+                  </div>
+                </div>
+              </div>
+            </v-window-item>
+          </v-window>
+        </v-card>
       </v-col>
 
       <!-- 右侧：交易组件（固定宽度） -->
@@ -105,6 +165,55 @@ const resolutionDate = computed(() => {
   return s ? s.replace(/,?\s*\d{4}$/, '').trim() || 'Mar 31' : 'Mar 31'
 })
 
+// Comments / Top Holders / Activity
+const detailTab = ref('activity')
+const activityMinAmount = ref<string>('0')
+const minAmountOptions = [
+  { title: 'Any', value: '0' },
+  { title: '$1', value: '1' },
+  { title: '$10', value: '10' },
+  { title: '$100', value: '100' },
+  { title: '$500', value: '500' },
+]
+
+interface ActivityItem {
+  id: string
+  user: string
+  avatarClass: string
+  avatarUrl?: string
+  action: 'bought' | 'sold'
+  side: 'Yes' | 'No'
+  amount: number
+  price: string
+  total: string
+  time: number
+}
+const activityList = ref<ActivityItem[]>([
+  { id: 'a1', user: 'Scottp1887', avatarClass: 'avatar-gradient-1', action: 'bought', side: 'Yes', amount: 914, price: '32.8¢', total: '$300', time: Date.now() - 10 * 60 * 1000 },
+  { id: 'a2', user: 'Outrageous-Budd...', avatarClass: 'avatar-gradient-2', action: 'sold', side: 'No', amount: 20, price: '70.0¢', total: '$14', time: Date.now() - 29 * 60 * 1000 },
+  { id: 'a3', user: '0xbc7db42d5ea9a...', avatarClass: 'avatar-gradient-3', action: 'bought', side: 'Yes', amount: 5, price: '68.0¢', total: '$3.40', time: Date.now() - 60 * 60 * 1000 },
+  { id: 'a4', user: 'FINNISH-FEMBOY', avatarClass: 'avatar-gradient-4', action: 'sold', side: 'No', amount: 57, price: '35.0¢', total: '$20', time: Date.now() - 2 * 60 * 60 * 1000 },
+  { id: 'a5', user: 'CryptoWhale', avatarClass: 'avatar-gradient-1', action: 'bought', side: 'No', amount: 143, price: '28.0¢', total: '$40', time: Date.now() - 3 * 60 * 60 * 1000 },
+  { id: 'a6', user: 'PolyTrader', avatarClass: 'avatar-gradient-2', action: 'sold', side: 'Yes', amount: 30, price: '72.0¢', total: '$21.60', time: Date.now() - 5 * 60 * 60 * 1000 },
+])
+
+const filteredActivity = computed(() => {
+  const min = Number(activityMinAmount.value) || 0
+  return activityList.value.filter((item) => {
+    const totalNum = parseFloat(item.total.replace(/[$,]/g, ''))
+    return totalNum >= min
+  })
+})
+
+function formatTimeAgo(ts: number): string {
+  const sec = Math.floor((Date.now() - ts) / 1000)
+  if (sec < 60) return 'just now'
+  if (sec < 3600) return `${Math.floor(sec / 60)}m ago`
+  if (sec < 86400) return `${Math.floor(sec / 3600)}h ago`
+  if (sec < 604800) return `${Math.floor(sec / 86400)}d ago`
+  return `${Math.floor(sec / 604800)}w ago`
+}
+
 // 时间粒度
 const selectedTimeRange = ref('ALL')
 const timeRanges = [
@@ -706,4 +815,189 @@ onUnmounted(() => {
     margin-top: 24px;
   }
 }
+
+/* Comments / Top Holders / Activity */
+.activity-card {
+  margin-top: 32px;
+  border: 1px solid #e5e7eb;
+  overflow: hidden;
+}
+
+.detail-tabs {
+  border-bottom: 1px solid #e5e7eb;
+}
+
+.detail-tabs :deep(.v-tab) {
+  text-transform: none;
+  font-size: 14px;
+}
+
+.detail-window {
+  overflow: visible;
+}
+
+.detail-pane {
+  padding: 16px;
+}
+
+.placeholder-pane {
+  color: #6b7280;
+  font-size: 14px;
+  padding: 24px 0;
+}
+
+.activity-toolbar {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 16px;
+  flex-wrap: wrap;
+  gap: 12px;
+}
+
+.min-amount-select {
+  max-width: 140px;
+  font-size: 14px;
+}
+
+.min-amount-select :deep(.v-field) {
+  font-size: 14px;
+}
+
+.live-badge {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  font-size: 13px;
+  color: #6b7280;
+}
+
+.live-dot {
+  width: 8px;
+  height: 8px;
+  border-radius: 50%;
+  background-color: #dc2626;
+  animation: live-pulse 1.5s ease-in-out infinite;
+}
+
+@keyframes live-pulse {
+  0%, 100% { opacity: 1; }
+  50% { opacity: 0.5; }
+}
+
+.activity-list {
+  display: flex;
+  flex-direction: column;
+  gap: 0;
+}
+
+.activity-item {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 12px 0;
+  border-bottom: 1px solid #f3f4f6;
+  font-size: 14px;
+}
+
+.activity-item:last-child {
+  border-bottom: none;
+}
+
+.activity-avatar {
+  width: 32px;
+  height: 32px;
+  border-radius: 50%;
+  flex-shrink: 0;
+  overflow: hidden;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.avatar-img {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+}
+
+.avatar-gradient-1 {
+  background: linear-gradient(135deg, #10b981 0%, #8b5cf6 100%);
+}
+
+.avatar-gradient-2 {
+  background: linear-gradient(135deg, #10b981 0%, #3b82f6 100%);
+}
+
+.avatar-gradient-3 {
+  background: linear-gradient(135deg, #f59e0b 0%, #eab308 100%);
+}
+
+.avatar-gradient-4 {
+  background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
+}
+
+.activity-body {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  align-items: center;
+  flex-wrap: wrap;
+  gap: 4px;
+}
+
+.activity-user {
+  font-weight: 500;
+  color: #111827;
+}
+
+.activity-action {
+  color: #6b7280;
+  margin-left: 2px;
+}
+
+.activity-amount {
+  font-weight: 600;
+  margin-left: 2px;
+}
+
+.amount-yes {
+  color: #059669;
+}
+
+.amount-no {
+  color: #dc2626;
+}
+
+.activity-price {
+  color: #6b7280;
+  margin-left: 2px;
+}
+
+.activity-total {
+  color: #6b7280;
+  margin-left: 2px;
+}
+
+.activity-meta {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  flex-shrink: 0;
+}
+
+.activity-time {
+  font-size: 13px;
+  color: #9ca3af;
+}
+
+.activity-link {
+  color: #9ca3af;
+  display: inline-flex;
+  line-height: 1;
+}
+
+.activity-link:hover {
+  color: #6b7280;
+}
 </style>