diff --git a/web/components/ChartCard/SignalsChart.tsx b/web/components/ChartCard/SignalsChart.tsx
index 32d75f3..946b33d 100644
--- a/web/components/ChartCard/SignalsChart.tsx
+++ b/web/components/ChartCard/SignalsChart.tsx
@@ -50,7 +50,7 @@ export default function SignalsChart({
 
   const { containerRef, legendRef } = usePlot(
     (el, w, h, lRef) => {
-      const data = buildSeriesData(rows, config.signal_type, timeMode);
+      const data = buildSeriesData(rows, config.signal_type, timeMode, config.series_limit);
       if (!data) return null;
 
       const { keys, allXs, data: seriesData } = data;
diff --git a/web/components/ChartCard/seriesData.ts b/web/components/ChartCard/seriesData.ts
index b5f89ea..fbbd9b0 100644
--- a/web/components/ChartCard/seriesData.ts
+++ b/web/components/ChartCard/seriesData.ts
@@ -1,7 +1,5 @@
 import type { SignalRow, ChartConfig, TimeMode } from '@/lib/types';
 
-const MAX_SERIES = 80;
-
 export interface SeriesData {
   keys: string[];
   allXs: number[];
@@ -12,6 +10,7 @@ export function buildSeriesData(
   rows: SignalRow[],
   signalType: ChartConfig['signal_type'],
   timeMode: TimeMode,
+  seriesLimit: number = 80,
 ): SeriesData | null {
   const seriesMap = new Map<string, Map<number, number>>();
 
@@ -34,7 +33,7 @@ export function buildSeriesData(
 
   if (seriesMap.size === 0) return null;
 
-  const keys = [...seriesMap.keys()].slice(0, MAX_SERIES);
+  const keys = [...seriesMap.keys()].slice(0, seriesLimit);
   const allXs = [
     ...new Set(
       keys.flatMap((k) => {