diff --git a/apps/web/src/views/detail.ejs b/apps/web/src/views/detail.ejs
index f29bdbd..f2f09d4 100644
--- a/apps/web/src/views/detail.ejs
+++ b/apps/web/src/views/detail.ejs
@@ -224,7 +224,7 @@
         // Seed running stats for SSE incremental updates
         _totalPings = results.length;
         _upPings = upPings.length;
-        _latencies = latencies.slice(-100);
+        _latencies = results.filter(r => r.latency_ms != null).slice(-100).map(r => ({ ms: r.latency_ms, up: r.up }));
 
         document.getElementById('stat-status').innerHTML = lastPing
           ? (lastPing.up ? '<span class="text-green-400">Up</span>' : '<span class="text-red-400">Down</span>')
@@ -361,7 +361,7 @@
     // No interval poll — SSE handles all live updates
 
     // Track running stats in memory for incremental updates
-    let _totalPings = 0, _upPings = 0, _latencies = [];
+    let _totalPings = 0, _upPings = 0, _latencies = []; // _latencies: [{ms, up}]
 
     // SSE: live ping updates
     const id = window.location.pathname.split('/').pop();
@@ -370,9 +370,9 @@
       _totalPings++;
       if (ping.up) _upPings++;
       if (ping.latency_ms != null) {
-        _latencies.push(ping.latency_ms);
+        _latencies.push({ ms: ping.latency_ms, up: ping.up });
         if (_latencies.length > 100) _latencies.shift();
-        const avg = Math.round(_latencies.reduce((a,b)=>a+b,0) / _latencies.length);
+        const avg = Math.round(_latencies.reduce((a,b)=>a+b.ms,0) / _latencies.length);
         document.getElementById('stat-latency').textContent = avg + 'ms';
       }
 
@@ -398,9 +398,7 @@
 
       // ── Latency chart ─────────────────────────────────────────────
       if (ping.latency_ms != null) {
-        renderLatencyChart([...(_latencies.map((ms, i) => ({
-          latency_ms: ms, checked_at: new Date(Date.now() - (_latencies.length - i) * 10000).toISOString()
-        })))]);
+        renderLatencyChart(_latencies.map(e => ({ latency_ms: e.ms, up: e.up, checked_at: '' })));
       }
 
       // ── Ping table ───────────────────────────────────────────────