From 2b22b032c12cb3bf47d8b36fb81ce3035c0a1d74 Mon Sep 17 00:00:00 2001
From: alireza <alirezaameria2@gmail.com>
Date: Wed, 26 Aug 2026 10:59:32 +0330
Subject: [PATCH] fix(lme): eliminate zero-drop spikes caused by exchange bank
 holidays and reporting gaps

---
 backend/scrape_lme.py               | 10 ++++++++++
 frontend/src/components/LmeView.tsx |  2 ++
 2 files changed, 12 insertions(+)

diff --git a/backend/scrape_lme.py b/backend/scrape_lme.py
index 4bd6b63..8fe6ece 100644
--- a/backend/scrape_lme.py
+++ b/backend/scrape_lme.py
@@ -286,6 +286,7 @@ def get_entire_diagram_data(field: str, ttl_seconds: int = 3600):
             series_type = "price"
 
         pts = []
+        last_valid_y = None
         for val in line:
             raw_x = val.attrib.get('x', '') # YYYY/MM/DD
             date_iso = raw_x.replace('/', '-')
@@ -298,6 +299,15 @@ def get_entire_diagram_data(field: str, ttl_seconds: int = 3600):
             except:
                 y_val = 0.0
 
+            # Filter out bank holiday / reporting zero anomalies (e.g. market closed)
+            if y_val <= 0:
+                if last_valid_y is not None:
+                    y_val = last_valid_y
+                else:
+                    continue
+            else:
+                last_valid_y = y_val
+
             pts.append({
                 "x": date_iso,
                 "date_display": date_display,
diff --git a/frontend/src/components/LmeView.tsx b/frontend/src/components/LmeView.tsx
index f99818d..cc4854b 100644
--- a/frontend/src/components/LmeView.tsx
+++ b/frontend/src/components/LmeView.tsx
@@ -752,6 +752,7 @@ export function LmeView() {
                       {/* Price Curve */}
                       {showPrice && (
                         <Area
+                          connectNulls={true}
                           yAxisId="price"
                           type="monotone"
                           dataKey="priceVal"
@@ -767,6 +768,7 @@ export function LmeView() {
                       {/* Stock Curve (Mapped to Left Y-Axis) */}
                       {showStocks && stockLine && (
                         <Line
+                          connectNulls={true}
                           yAxisId="stocks"
                           type="monotone"
                           dataKey="stockVal"