diff --git a/src/components/TransactionChart.tsx b/src/components/TransactionChart.tsx
index 56e3745..0e61c36 100644
--- a/src/components/TransactionChart.tsx
+++ b/src/components/TransactionChart.tsx
@@ -40,13 +40,13 @@ const TransactionChart: React.FC<TransactionChartProps> = ({
     const dates = transactions.map(tx => new Date(tx.date));
     const minDate = new Date(Math.min(...dates.map(d => d.getTime())));
     const maxDate = new Date(Math.max(...dates.map(d => d.getTime())));
-    const timeSpanDays = (maxDate.getTime() - minDate.getTime()) / (1000 * 60 * 60 * 24);
+    const timeSpanDays = Math.max((maxDate.getTime() - minDate.getTime()) / (1000 * 60 * 60 * 24), 1);
     
     // Calculate transaction density per day
-    const transactionsPerDay = transactions.length / Math.max(timeSpanDays, 1);
+    const transactionsPerDay = transactions.length / timeSpanDays;
     
-    // Smart scoping: if many transactions per day, use hourly; otherwise daily
-    if (transactionsPerDay > 10 && timeSpanDays < 7) {
+    // Smart scoping: if many transactions per day or short timespan with multiple transactions, use hourly
+    if ((transactionsPerDay > 5 && timeSpanDays < 7) || (transactions.length > 3 && timeSpanDays <= 1)) {
       return 'hour';
     }
     return 'day';
@@ -81,7 +81,7 @@ const TransactionChart: React.FC<TransactionChartProps> = ({
     });
 
     // Convert to array and calculate profit
-    return Array.from(dateMap.values())
+    const sortedData = Array.from(dateMap.values())
       .map(entry => ({
         ...entry,
         profit: entry.revenue - entry.costs,
@@ -90,6 +90,23 @@ const TransactionChart: React.FC<TransactionChartProps> = ({
           : format(new Date(entry.date), 'MMM dd')
       }))
       .sort((a, b) => a.date.localeCompare(b.date));
+
+    // Add cumulative values
+    let cumulativeCosts = 0;
+    let cumulativeRevenue = 0;
+    let cumulativeProfit = 0;
+
+    return sortedData.map(entry => {
+      cumulativeCosts += entry.costs;
+      cumulativeRevenue += entry.revenue;
+      cumulativeProfit += entry.profit;
+      return {
+        ...entry,
+        cumulativeCosts,
+        cumulativeRevenue,
+        cumulativeProfit
+      };
+    });
   };
 
   const getOverviewChartData = (jobs: IndJob[]) => {
@@ -119,7 +136,7 @@ const TransactionChart: React.FC<TransactionChartProps> = ({
       }
     });
 
-    return Array.from(dateMap.values())
+    const sortedData = Array.from(dateMap.values())
       .map(entry => ({
         ...entry,
         formattedDate: timeFormat === 'hour'
@@ -127,11 +144,25 @@ const TransactionChart: React.FC<TransactionChartProps> = ({
           : format(new Date(entry.date), 'MMM dd')
       }))
       .sort((a, b) => a.date.localeCompare(b.date));
+
+    // Add cumulative values
+    let cumulativeRevenue = 0;
+    let cumulativeProfit = 0;
+
+    return sortedData.map(entry => {
+      cumulativeRevenue += entry.revenue;
+      cumulativeProfit += entry.profit;
+      return {
+        ...entry,
+        cumulativeRevenue,
+        cumulativeProfit
+      };
+    });
   };
 
   const formatTooltipValue = (value: number) => formatISK(value);
 
-  const data = type === 'overview' && jobs ? getOverviewChartData(jobs) : job ? getJobChartData(job) : [];
+  const data = (type === 'overview' || type === 'total-revenue' || type === 'total-profit') && jobs ? getOverviewChartData(jobs) : job ? getJobChartData(job) : [];
 
   const getTitle = () => {
     if (type === 'overview') return 'Overview - Revenue & Profit Over Time';
@@ -198,6 +229,7 @@ const TransactionChart: React.FC<TransactionChartProps> = ({
             labelStyle={{ color: '#F3F4F6' }}
             contentStyle={{ backgroundColor: '#1F2937', border: '1px solid #374151' }}
           />
+          <Legend />
           <Area
             type="monotone"
             dataKey="costs"
@@ -206,6 +238,15 @@ const TransactionChart: React.FC<TransactionChartProps> = ({
             fillOpacity={0.6}
             name="Costs"
           />
+          <Area
+            type="monotone"
+            dataKey="cumulativeCosts"
+            stroke="#DC2626"
+            fill="none"
+            strokeWidth={2}
+            strokeDasharray="5 5"
+            name="Cumulative Costs"
+          />
         </AreaChart>
       );
     }
@@ -221,6 +262,7 @@ const TransactionChart: React.FC<TransactionChartProps> = ({
             labelStyle={{ color: '#F3F4F6' }}
             contentStyle={{ backgroundColor: '#1F2937', border: '1px solid #374151' }}
           />
+          <Legend />
           <Area
             type="monotone"
             dataKey="revenue"
@@ -229,6 +271,15 @@ const TransactionChart: React.FC<TransactionChartProps> = ({
             fillOpacity={0.6}
             name="Revenue"
           />
+          <Area
+            type="monotone"
+            dataKey="cumulativeRevenue"
+            stroke="#059669"
+            fill="none"
+            strokeWidth={2}
+            strokeDasharray="5 5"
+            name="Cumulative Revenue"
+          />
         </AreaChart>
       );
     }
@@ -278,6 +329,28 @@ const TransactionChart: React.FC<TransactionChartProps> = ({
             dot={{ fill: '#3B82F6', strokeWidth: 2, r: 4 }}
           />
         )}
+        {!hiddenLines.has('cumulativeRevenue') && (
+          <Line
+            type="monotone"
+            dataKey="cumulativeRevenue"
+            stroke="#059669"
+            strokeWidth={2}
+            strokeDasharray="5 5"
+            name="Cumulative Revenue"
+            dot={false}
+          />
+        )}
+        {!hiddenLines.has('cumulativeProfit') && (
+          <Line
+            type="monotone"
+            dataKey="cumulativeProfit"
+            stroke="#1E40AF"
+            strokeWidth={2}
+            strokeDasharray="5 5"
+            name="Cumulative Profit"
+            dot={false}
+          />
+        )}
       </LineChart>
     );
   };
diff --git a/src/pages/Index.tsx b/src/pages/Index.tsx
index 5bfde08..22308ea 100644
--- a/src/pages/Index.tsx
+++ b/src/pages/Index.tsx
@@ -4,7 +4,7 @@ import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
 import { Popover, PopoverContent, PopoverTrigger } from '@/components/ui/popover';
-import { Plus, Factory, TrendingUp, Briefcase, FileText, Settings } from 'lucide-react';
+import { Plus, Factory, TrendingUp, Briefcase, FileText, Settings, BarChart3 } from 'lucide-react';
 import { IndTransactionRecordNoId, IndJobRecordNoId } from '@/lib/pbtypes';
 import { formatISK } from '@/utils/priceUtils';
 import { getStatusPriority } from '@/utils/jobStatusUtils';
@@ -16,6 +16,7 @@ import { useJobs } from '@/hooks/useDataService';
 import { useJobMetrics } from '@/hooks/useJobMetrics';
 import SearchOverlay from '@/components/SearchOverlay';
 import RecapPopover from '@/components/RecapPopover';
+import TransactionChart from '@/components/TransactionChart';
 
 const Index = () => {
   const {
@@ -35,6 +36,8 @@ const Index = () => {
   const [showBatchForm, setShowBatchForm] = useState(false);
   const [searchOpen, setSearchOpen] = useState(false);
   const [searchQuery, setSearchQuery] = useState('');
+  const [totalRevenueChartOpen, setTotalRevenueChartOpen] = useState(false);
+  const [totalProfitChartOpen, setTotalProfitChartOpen] = useState(false);
   const [collapsedGroups, setCollapsedGroups] = useState<Record<string, boolean>>(() => {
     const saved = localStorage.getItem('jobGroupsCollapsed');
     return saved ? JSON.parse(saved) : {};
@@ -220,6 +223,14 @@ const Index = () => {
             <CardTitle className="flex items-center gap-2">
               <TrendingUp className="w-5 h-5" />
               Total Revenue
+              <Button
+                variant="ghost"
+                size="sm"
+                className="h-6 w-6 p-0 ml-auto"
+                onClick={() => setTotalRevenueChartOpen(true)}
+              >
+                <BarChart3 className="w-4 h-4" />
+              </Button>
             </CardTitle>
           </CardHeader>
           <CardContent>
@@ -239,6 +250,14 @@ const Index = () => {
             <CardTitle className="flex items-center gap-2">
               <Briefcase className="w-5 h-5" />
               Total Profit
+              <Button
+                variant="ghost"
+                size="sm"
+                className="h-6 w-6 p-0 ml-auto"
+                onClick={() => setTotalProfitChartOpen(true)}
+              >
+                <BarChart3 className="w-4 h-4" />
+              </Button>
             </CardTitle>
           </CardHeader>
           <CardContent>
@@ -321,6 +340,20 @@ const Index = () => {
           onTransactionsAssigned={handleBatchTransactionsAssigned}
         />
       )}
+
+      <TransactionChart
+        jobs={regularJobs}
+        type="total-revenue"
+        isOpen={totalRevenueChartOpen}
+        onClose={() => setTotalRevenueChartOpen(false)}
+      />
+
+      <TransactionChart
+        jobs={regularJobs}
+        type="total-profit"
+        isOpen={totalProfitChartOpen}
+        onClose={() => setTotalProfitChartOpen(false)}
+      />
     </div>
   );
 };