diff --git a/stockscope/src/main/java/com/sharecomparison/presentation/WebPageController.java b/stockscope/src/main/java/com/sharecomparison/presentation/WebPageController.java
index f859a02..9d0f45e 100644
--- a/stockscope/src/main/java/com/sharecomparison/presentation/WebPageController.java
+++ b/stockscope/src/main/java/com/sharecomparison/presentation/WebPageController.java
@@ -1,30 +1,22 @@
 package com.sharecomparison.presentation;
 
 import java.time.LocalDate;
-import java.util.ArrayList;
-import java.util.Comparator;
-import java.util.HashMap;
-import java.util.LinkedHashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.stream.Collectors;
 
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 
-import com.sharecomparison.application.MarketDataService;
-import com.sharecomparison.domain.PriceData;
+import com.sharecomparison.application.IPriceController;
+import com.sharecomparison.domain.ComparisonResult;
 
 @Controller
 public class WebPageController {
 
-    private final MarketDataService marketDataService;
+    private final IPriceController priceController;
 
-    public WebPageController(MarketDataService marketDataService) {
-        this.marketDataService = marketDataService;
+    public WebPageController(IPriceController priceController) {
+        this.priceController = priceController;
     }
 
     @GetMapping("/")
@@ -37,7 +29,7 @@ public String showForm(Model model) {
         return "index";
     }
 
-    @GetMapping("/compare")   
+    @GetMapping("/compare")
     public String compare(
             @RequestParam String symbol1,
             @RequestParam String symbol2,
@@ -51,10 +43,9 @@ public String compare(
         symbol1 = symbol1.trim().toUpperCase();
         symbol2 = symbol2.trim().toUpperCase();
 
-        List<PriceData> data1 = marketDataService.fetchSharePrices(symbol1, start, end);
-        List<PriceData> data2 = marketDataService.fetchSharePrices(symbol2, start, end);
+        ComparisonResult result = priceController.comparePrices(symbol1, symbol2, start, end);
 
-        if (data1.isEmpty() || data2.isEmpty()) {
+        if (result.getSymbol1Data().isEmpty() || result.getSymbol2Data().isEmpty()) {
             model.addAttribute("error", "No data available for one or both symbols in this range.");
             model.addAttribute("symbol1", symbol1);
             model.addAttribute("symbol2", symbol2);
@@ -63,89 +54,6 @@ public String compare(
             return "index";
         }
 
-        data1.sort(Comparator.comparing(PriceData::getDate));
-        data2.sort(Comparator.comparing(PriceData::getDate));
-
-        // Chart coords calculation
-        double chartWidth = 800, chartHeight = 300;
-        double left = 80, right = left + chartWidth;
-        double bottom = 320, top = bottom - chartHeight;
-        double midY = top + chartHeight / 2;
-
-        double minPrice = Double.MAX_VALUE, maxPrice = Double.MIN_VALUE;
-        for (PriceData p : data1) {
-            minPrice = Math.min(minPrice, p.getClosingPrice());
-            maxPrice = Math.max(maxPrice, p.getClosingPrice());
-        }
-        for (PriceData p : data2) {
-            minPrice = Math.min(minPrice, p.getClosingPrice());
-            maxPrice = Math.max(maxPrice, p.getClosingPrice());
-        }
-        if (maxPrice == minPrice) maxPrice += 1.0;
-        double priceRange = maxPrice - minPrice;
-
-        // Align series by date: only plot dates present in both data sets
-        Map<LocalDate, PriceData> map1 = data1.stream()
-                .collect(Collectors.toMap(PriceData::getDate, p -> p, (existing, replacement) -> existing));
-        Map<LocalDate, PriceData> map2 = data2.stream()
-                .collect(Collectors.toMap(PriceData::getDate, p -> p, (existing, replacement) -> existing));
-
-        Set<LocalDate> commonDates = new LinkedHashSet<>(map1.keySet());
-        commonDates.retainAll(map2.keySet());
-        List<LocalDate> sortedDates = new ArrayList<>(commonDates);
-        sortedDates.sort(Comparator.naturalOrder());
-
-        int n = sortedDates.size();
-        if (n == 0) {
-            model.addAttribute("error", "No overlapping trading dates found for the two symbols in this range.");
-            model.addAttribute("symbol1", symbol1);
-            model.addAttribute("symbol2", symbol2);
-            model.addAttribute("startDate", start.toString());
-            model.addAttribute("endDate", end.toString());
-            return "index";
-        }
-        double xStep = n > 1 ? chartWidth / (n - 1) : 0;
-
-        StringBuilder path1 = new StringBuilder();
-        StringBuilder path2 = new StringBuilder();
-        List<Map<String, Object>> points1 = new ArrayList<>();
-        List<Map<String, Object>> points2 = new ArrayList<>();
-
-        for (int i = 0; i < n; i++) {
-            double x = left + i * xStep;
-            LocalDate date = sortedDates.get(i);
-
-            PriceData p1 = map1.get(date);
-            double y1 = bottom - ((p1.getClosingPrice() - minPrice) / priceRange) * chartHeight;
-            path1.append(i == 0 ? "M" : "L").append(x).append(",").append(y1).append(" ");
-            points1.add(Map.of("x", x, "y", y1, "value", p1.getClosingPrice(), "date", date.toString()));
-
-            PriceData p2 = map2.get(date);
-            double y2 = bottom - ((p2.getClosingPrice() - minPrice) / priceRange) * chartHeight;
-            path2.append(i == 0 ? "M" : "L").append(x).append(",").append(y2).append(" ");
-            points2.add(Map.of("x", x, "y", y2, "value", p2.getClosingPrice(), "date", date.toString()));
-        }
-
-        Map<String, Object> chartData = new HashMap<>();
-        chartData.put("left", left);
-        chartData.put("right", right);
-        chartData.put("top", top);
-        chartData.put("bottom", bottom);
-        chartData.put("midY", midY);
-        chartData.put("symbol1Path", path1.toString());
-        chartData.put("symbol2Path", path2.toString());
-        chartData.put("symbol1Points", points1);
-        chartData.put("symbol2Points", points2);
-
-        Map<String, Object> result = new HashMap<>();
-        result.put("symbol1", symbol1);
-        result.put("symbol2", symbol2);
-        result.put("startDate", start);
-        result.put("endDate", end);
-        result.put("chartData", chartData);
-        result.put("symbol1Data", data1);
-        result.put("symbol2Data", data2);
-
         model.addAttribute("result", result);
         model.addAttribute("symbol1", symbol1);
         model.addAttribute("symbol2", symbol2);
@@ -154,4 +62,4 @@ public String compare(
 
         return "index";
     }
-}
\ No newline at end of file
+}