diff --git a/financial-data-analyst/app/api/finance/route.ts b/financial-data-analyst/app/api/finance/route.ts
index 4b990bda..41c60b73 100644
--- a/financial-data-analyst/app/api/finance/route.ts
+++ b/financial-data-analyst/app/api/finance/route.ts
@@ -73,6 +73,7 @@ const tools: ToolSchema[] = [
             footer: { type: "string" as const },
             totalLabel: { type: "string" as const },
             xAxisKey: { type: "string" as const },
+            yAxisKey: { type: "string" as const },
           },
           required: ["title", "description"],
         },
@@ -270,6 +271,7 @@ For Time-Series (Line/Bar/Area):
   ],
   config: {
     xAxisKey: "period",
+    yAxisKey: "sales",
     title: "Quarterly Revenue",
     description: "Revenue growth over time"
   },
@@ -286,6 +288,7 @@ For Comparisons (MultiBar):
   ],
   config: {
     xAxisKey: "category",
+    yAxisKey: "sales",
     title: "Product Performance",
     description: "Sales vs Costs by Product"
   },
diff --git a/financial-data-analyst/components/ChartRenderer.tsx b/financial-data-analyst/components/ChartRenderer.tsx
index 66c7d05a..6da38576 100644
--- a/financial-data-analyst/components/ChartRenderer.tsx
+++ b/financial-data-analyst/components/ChartRenderer.tsx
@@ -22,6 +22,7 @@ import {
   Pie,
   PieChart,
   XAxis,
+  YAxis
 } from "recharts";
 import {
   ChartContainer,
@@ -54,6 +55,17 @@ function BarChartComponent({ data }: { data: ChartData }) {
                   : value;
               }}
             />
+            <YAxis
+              dataKey={data.config.yAxisKey}
+              tickLine={false}
+              axisLine={false}
+              tickMargin={8}
+              tickFormatter={(value) => {
+                return value.length > 20
+                  ? `${value.substring(0, 17)}...`
+                  : value;
+              }}
+            />
             <ChartTooltip
               cursor={false}
               content={<ChartTooltipContent hideLabel />}
@@ -110,6 +122,17 @@ function MultiBarChartComponent({ data }: { data: ChartData }) {
                   : value;
               }}
             />
+            <YAxis
+              dataKey={data.config.yAxisKey}
+              tickLine={false}
+              axisLine={false}
+              tickMargin={8}
+              tickFormatter={(value) => {
+                return value.length > 20
+                  ? `${value.substring(0, 17)}...`
+                  : value;
+              }}
+            />
             <ChartTooltip
               cursor={false}
               content={<ChartTooltipContent indicator="dashed" />}
@@ -176,6 +199,17 @@ function LineChartComponent({ data }: { data: ChartData }) {
                   : value;
               }}
             />
+            <YAxis
+              dataKey={data.config.yAxisKey}
+              tickLine={false}
+              axisLine={false}
+              tickMargin={8}
+              tickFormatter={(value) => {
+                return value.length > 20
+                  ? `${value.substring(0, 17)}...`
+                  : value;
+              }}
+            />
             <ChartTooltip
               cursor={false}
               content={<ChartTooltipContent hideLabel />}
@@ -342,6 +376,17 @@ function AreaChartComponent({
                   : value;
               }}
             />
+            <YAxis
+              dataKey={data.config.yAxisKey}
+              tickLine={false}
+              axisLine={false}
+              tickMargin={8}
+              tickFormatter={(value) => {
+                return value.length > 20
+                  ? `${value.substring(0, 17)}...`
+                  : value;
+              }}
+            />
             <ChartTooltip
               cursor={false}
               content={
diff --git a/financial-data-analyst/types/chart.ts b/financial-data-analyst/types/chart.ts
index cc18081a..ee55870a 100644
--- a/financial-data-analyst/types/chart.ts
+++ b/financial-data-analyst/types/chart.ts
@@ -19,6 +19,7 @@ export interface ChartData {
     footer?: string;
     totalLabel?: string;
     xAxisKey?: string;
+    yAxisKey?: string;
   };
   data: Array<Record<string, any>>;
   chartConfig: ChartConfig;