diff --git a/src/components/charts/UpLow.vue b/src/components/charts/UpLow.vue
index c1d35a8..d52531b 100644
--- a/src/components/charts/UpLow.vue
+++ b/src/components/charts/UpLow.vue
@@ -40,7 +40,7 @@ const init = () => {
 
   let maxVal:number = chgFlag ? 5200 : 0
   if (!chgFlag) {
-    maxVal = chgContent.value.map(x => x.limitUpCount + x.limitLowCount).sort((a, b) => b - a).at(0)
+    maxVal = chgContent.value.map(x => x.limitUpCount + x.limitLowCount).sort((a, b) => a - b).pop()
   }
 
   const myChart = echarts.init(UpLow.value)