diff --git a/hive-ag3nt/assets/stats.html b/hive-ag3nt/assets/stats.html
index 2c30597..66a6a8d 100644
--- a/hive-ag3nt/assets/stats.html
+++ b/hive-ag3nt/assets/stats.html
@@ -68,7 +68,10 @@
   </div>
 
   <div class="window-tabs" id="window-tabs">
+    <button data-w="1h">last 1h</button>
+    <button data-w="4h">last 4h</button>
     <button data-w="24h" class="active">last 24h</button>
+    <button data-w="3d">last 3d</button>
     <button data-w="7d">last 7d</button>
     <button data-w="30d">last 30d</button>
   </div>
diff --git a/hive-ag3nt/src/stats.rs b/hive-ag3nt/src/stats.rs
index bf95b45..f22165f 100644
--- a/hive-ag3nt/src/stats.rs
+++ b/hive-ag3nt/src/stats.rs
@@ -20,7 +20,10 @@ use hive_sh4re::ReminderStats;
 /// total span + the bucket width used to roll up trend series.
 #[derive(Debug, Clone, Copy)]
 pub enum Window {
+    Hour,
+    FourHour,
     Day,
+    ThreeDay,
     Week,
     Month,
 }
@@ -28,6 +31,9 @@ pub enum Window {
 impl Window {
     pub fn parse(s: &str) -> Self {
         match s {
+            "1h" => Self::Hour,
+            "4h" => Self::FourHour,
+            "3d" => Self::ThreeDay,
             "7d" => Self::Week,
             "30d" => Self::Month,
             _ => Self::Day,
@@ -36,15 +42,21 @@ impl Window {
 
     fn label(self) -> &'static str {
         match self {
+            Self::Hour => "1h",
+            Self::FourHour => "4h",
             Self::Day => "24h",
+            Self::ThreeDay => "3d",
             Self::Week => "7d",
             Self::Month => "30d",
         }
     }
 
-    fn span_secs(self) -> i64 {
+    pub fn span_secs(self) -> i64 {
         match self {
+            Self::Hour => 3600,
+            Self::FourHour => 4 * 3600,
             Self::Day => 24 * 3600,
+            Self::ThreeDay => 3 * 24 * 3600,
             Self::Week => 7 * 24 * 3600,
             Self::Month => 30 * 24 * 3600,
         }
@@ -52,8 +64,11 @@ impl Window {
 
     fn bucket_secs(self) -> i64 {
         match self {
-            // hourly for the 24h view, daily for the longer ranges.
-            Self::Day => 3600,
+            // 5-min buckets for 1h (12 buckets), 15-min for 4h (16 buckets),
+            // hourly for 24h + 3d, daily for 7d + 30d.
+            Self::Hour => 300,
+            Self::FourHour => 900,
+            Self::Day | Self::ThreeDay => 3600,
             Self::Week | Self::Month => 24 * 3600,
         }
     }
diff --git a/hive-ag3nt/src/web_ui.rs b/hive-ag3nt/src/web_ui.rs
index a172bac..bbd1e76 100644
--- a/hive-ag3nt/src/web_ui.rs
+++ b/hive-ag3nt/src/web_ui.rs
@@ -319,13 +319,9 @@ async fn api_stats(
 ) -> axum::Json<crate::stats::Snapshot> {
     let window = crate::stats::Window::parse(q.window.as_deref().unwrap_or("24h"));
     let mut snapshot = crate::stats::snapshot_default(window);
-    // Fetch reminder stats from the broker. The window spans are:
-    // 24h = 86400s, 7d = 604800s, 30d = 2592000s.
-    let window_secs = match window {
-        crate::stats::Window::Day => 24 * 3600,
-        crate::stats::Window::Week => 7 * 24 * 3600,
-        crate::stats::Window::Month => 30 * 24 * 3600,
-    };
+    // Pass the window span to the reminder-stats RPC so the broker
+    // filters its counts to the same time range as the chart data.
+    let window_secs = window.span_secs();
     snapshot.reminder_stats = fetch_reminder_stats(&state.socket, state.flavor(), window_secs as u64).await;
     axum::Json(snapshot)
 }