diff --git a/resources/views/about.blade.php b/resources/views/about.blade.php
index e23bb38..0d90d8a 100644
--- a/resources/views/about.blade.php
+++ b/resources/views/about.blade.php
@@ -162,6 +162,7 @@
 				title: {
 					text: 'Echomail'
 				},
+				max: 100,
 			},
 			legend: {
 				symbolWidth: 40
@@ -202,7 +203,12 @@
 				dataType: 'json',
 				data : {name: item.name},
 				success: function(data) {
+					var avg;
 					item.setData(data);
+					if (data.length) {
+						avg = data.reduce(function(a,b) { return ((typeof a == 'object') ? a.y : a)+b.y; })/data.length*1.5;
+						item.yAxis.update({max: item.yAxis.max < avg ? avg : item.yAxis.max,});
+					}
 				},
 				cache: false
 			});
diff --git a/resources/views/domain/view.blade.php b/resources/views/domain/view.blade.php
index ddd35de..8291542 100644
--- a/resources/views/domain/view.blade.php
+++ b/resources/views/domain/view.blade.php
@@ -355,6 +355,7 @@
 				title: {
 					text: 'Echomail'
 				},
+				max: {{ $o->echoarea_total_daily()->groupBy('name')->map(fn($item)=>$item->map(fn($item)=>$item->count)->average()*1.5)->max() ?: 10 }},
 			},
 			legend: {
 				align: 'right',