diff --git a/frontend/src/app/components/incoming-transactions-graph/incoming-transactions-graph.component.ts b/frontend/src/app/components/incoming-transactions-graph/incoming-transactions-graph.component.ts
index d57ce616e..1edd5c208 100644
--- a/frontend/src/app/components/incoming-transactions-graph/incoming-transactions-graph.component.ts
+++ b/frontend/src/app/components/incoming-transactions-graph/incoming-transactions-graph.component.ts
@@ -133,7 +133,7 @@ export class IncomingTransactionsGraphComponent implements OnInit, OnChanges {
             symbol: 'none',
             lineStyle: {
               color: '#fff',
-              opacity: 0.75,
+              opacity: 1,
               width: 2,
             },
             data: [{
diff --git a/frontend/src/app/components/mempool-graph/mempool-graph.component.ts b/frontend/src/app/components/mempool-graph/mempool-graph.component.ts
index 2231aac22..c02e8d3f7 100644
--- a/frontend/src/app/components/mempool-graph/mempool-graph.component.ts
+++ b/frontend/src/app/components/mempool-graph/mempool-graph.component.ts
@@ -129,6 +129,22 @@ export class MempoolGraphComponent implements OnInit, OnChanges {
               opacity: 0.85,
             },
           },
+          markLine: {
+            silent: true,
+            symbol: 'none',
+            lineStyle: {
+              color: '#fff',
+              opacity: 1,
+              width: this.inverted ? 2 : 0,
+            },
+            data: [{
+              yAxis: '1000000',
+              label: {
+                show: false,
+                color: '#ffffff',
+              }
+            }],
+          },
           areaStyle: {
             color: chartColors[index],
             opacity: 1,