diff --git a/public/scripts/trends.js b/public/scripts/trends.js
index 48bd44a..bd5df88 100644
--- a/public/scripts/trends.js
+++ b/public/scripts/trends.js
@@ -1,36 +1,34 @@
+
 // Timeframes
 const tfConfig = [
-  { unit:'hours',  count:24,  label:'Last 24 Hours'  },
-  { unit:'days',   count:7,   label:'Last 7 Days'    },
-  { unit:'weeks',  count:4,   label:'Last 4 Weeks'   },
-  { unit:'months', count:12,  label:'Last 12 Months' },
-  { unit:'years',  count:1,   label:'All Time'        }
+  { unit: 'hours',  count: 24,  label: 'Last 24 Hours'   },
+  { unit: 'days',   count: 7,   label: 'Last 7 Days'     },
+  { unit: 'weeks',  count: 4,   label: 'Last 4 Weeks'    },
+  { unit: 'months', count: 12,  label: 'Last 12 Months'  },
+  { unit: 'years',  count: 1,   label: 'All Time'        }
 ];
 
 let readings = [];
 let chart;
 
-//  Subtract helper
+// Helper: subtract time
 function subtract(date, count, unit) {
   const d = new Date(date);
-  switch(unit) {
-    case 'hours':  d.setHours(d.getHours() - count);    break;
-    case 'days':   d.setDate(d.getDate() - count);      break;
-    case 'weeks':  d.setDate(d.getDate() - 7*count);    break;
-    case 'months': d.setMonth(d.getMonth() - count);    break;
-    case 'years':  d.setFullYear(d.getFullYear() - count); break;
+  switch (unit) {
+    case 'hours':  d.setHours(d.getHours() - count);      break;
+    case 'days':   d.setDate(d.getDate() - count);        break;
+    case 'weeks':  d.setDate(d.getDate() - 7 * count);    break;
+    case 'months': d.setMonth(d.getMonth() - count);      break;
+    case 'years':  d.setFullYear(d.getFullYear() - count);break;
   }
   return d;
 }
 
+// On load
 document.addEventListener('DOMContentLoaded', () => {
-  // 1) Grab the server‐injected readings
+  // Grab server-injected data
   const data = window.__INITIAL_READINGS__ || [];
-  if (!data.length) {
-    console.warn('No initial readings found.');
-  }
 
-  // 2) Map into local array with Date objs & formatted strings
   readings = data.map(r => {
     const dt = new Date(r.epoch_ms);
     return {
@@ -45,9 +43,9 @@ document.addEventListener('DOMContentLoaded', () => {
         month:    'numeric',
         day:      'numeric',
         year:     '2-digit',
+        hour12:   false,
         hour:     '2-digit',
-        minute:   '2-digit',
-        hour12:   false
+        minute:   '2-digit'
       }).replace(',', ' @')
     };
   });
@@ -58,7 +56,7 @@ document.addEventListener('DOMContentLoaded', () => {
 });
 
 function setupUI() {
-  // Slider + label
+  // Slider
   const slider = document.getElementById('timeframe-slider');
   const label  = document.getElementById('timeframe-label');
   slider.addEventListener('input', () => {
@@ -67,24 +65,33 @@ function setupUI() {
   });
   label.textContent = tfConfig[slider.value].label;
 
-  // Metric checkboxes
+  // Metric toggles
   document.getElementsByName('metric').forEach(cb => {
     cb.addEventListener('change', updateView);
   });
 
-  // Table sorting
+  // Sortable headers
   document.querySelectorAll('#trends-table thead th.sortable').forEach(th => {
     th.addEventListener('click', () => {
-      const idx = th.cellIndex;
+      // Determine sort order
       const asc = !th.classList.contains('asc');
+      // Clear other indicators
+      document.querySelectorAll('#trends-table thead th')
+        .forEach(h => h.classList.remove('asc','desc'));
+      th.classList.add(asc ? 'asc' : 'desc');
+
+      const idx   = th.cellIndex;
       const tbody = document.getElementById('trends-table-body');
-      Array.from(tbody.rows)
-        .sort((a,b) => asc
-          ? a.cells[idx].textContent.localeCompare(b.cells[idx].textContent, undefined, {numeric:true})
-          : b.cells[idx].textContent.localeCompare(a.cells[idx].textContent, undefined, {numeric:true})
-        )
-        .forEach(r => tbody.appendChild(r));
-      th.classList.toggle('asc', asc);
+      const rows  = Array.from(tbody.rows);
+
+      rows.sort((a, b) => {
+        const av = a.cells[idx].textContent;
+        const bv = b.cells[idx].textContent;
+        return asc
+          ? av.localeCompare(bv, undefined, { numeric: true })
+          : bv.localeCompare(av, undefined, { numeric: true });
+      });
+      rows.forEach(r => tbody.appendChild(r));
     });
   });
 }
@@ -96,11 +103,11 @@ function initChart() {
     data: { labels: [], datasets: [] },
     options: {
       scales: {
-        x: { title: { display:true, text:'Time (EST)' } },
-        y: { title: { display:true, text:'Value' } }
+        x: { title: { display: true, text: 'Time (EST)' } },
+        y: { title: { display: true, text: 'Value' } }
       },
-      interaction: { mode:'index', intersect:false },
-      plugins: { legend:{ position:'top' } },
+      interaction: { mode: 'index', intersect: false },
+      plugins: { legend: { position: 'top' } },
       maintainAspectRatio: false
     }
   });
@@ -109,21 +116,21 @@ function initChart() {
 function updateView() {
   if (!chart) return;
 
-  // Determine "now" from the latest reading, not the browser clock
+  // Determine 'now' based on latest reading
   const maxEpoch = Math.max(...readings.map(r => r.dateObj.getTime()));
   const nowDate  = new Date(maxEpoch);
 
   // Compute cutoff
   const idx    = +document.getElementById('timeframe-slider').value;
   const { unit, count } = tfConfig[idx];
-  const cutoff = (idx === 4)
-    ? new Date(0)                       // "All Time"
+  const cutoff = idx === 4
+    ? new Date(0)
     : subtract(nowDate, count, unit);
 
-  // Filter
+  // Filter data
   const filtered = readings.filter(r => r.dateObj >= cutoff);
 
-  // Which metrics?
+  // Selected metrics
   const selected = Array.from(document.getElementsByName('metric'))
     .filter(cb => cb.checked)
     .map(cb => cb.value);
@@ -170,4 +177,3 @@ function updateView() {
     tbody.appendChild(tr);
   });
 }
-