diff --git a/index.html b/index.html
index 6100a03..e7fbc42 100644
--- a/index.html
+++ b/index.html
@@ -1765,27 +1765,47 @@ ${numPeople > 0 ? `
   const chartLabels = chartData.map(d => `M${d.m}`);
   const chartValues = chartData.map(d => d.cum);
 
+  // Build referral dataset separately to avoid nested backtick issues
+  let referralDataset = null;
+  if (numPeople > 0) {
+    const label = numPeople > 1 ? `Total (${numPeople} people) Cumulative Referral Earnings` : 'Your Cumulative Referral Earnings';
+    const data = numPeople > 1 ? chartValues.map(v => v * numPeople) : chartValues;
+    referralDataset = {
+      label: label,
+      data: data,
+      borderColor: '#6c5ce7',
+      backgroundColor: 'rgba(108,92,231,0.1)',
+      fill: true,
+      tension: 0.3,
+      pointRadius: 3,
+      pointHoverRadius: 5,
+    };
+  }
+
   if (chart1) { chart1.destroy(); chart1 = null; }
   if (chart2) { chart2.destroy(); chart2 = null; }
   if (chart3) { chart3.destroy(); chart3 = null; }
 
+  const datasets = [
+    {
+      label: 'Their Cumulative Profit',
+      data: chartProfitData.map(d => d.cum),
+      borderColor: '#00d2ff',
+      backgroundColor: 'rgba(0,210,255,0.1)',
+      fill: true,
+      tension: 0.3,
+      pointRadius: 3,
+      pointHoverRadius: 5,
+    },
+    referralDataset,
+  ].filter(Boolean);
+
   const ctx1 = document.getElementById('profitChart').getContext('2d');
   chart1 = new Chart(ctx1, {
     type: 'line',
     data: {
       labels: chartLabels,
-      datasets: [
-      ${numPeople > 0 ? `{
-              label: `${numPeople > 1 ? `Total (${numPeople} people)` : 'Your'} Cumulative Referral Earnings`,
-              data: numPeople > 1 ? chartValues.map(v => v * numPeople) : chartValues,
-              borderColor: '#6c5ce7',
-              backgroundColor: 'rgba(108,92,231,0.1)',
-              fill: true,
-              tension: 0.3,
-              pointRadius: 3,
-              pointHoverRadius: 5,
-            },` : ''}
-            {
+      datasets: datasets,
     },
     options: {
       responsive: true,