diff --git a/src/module/timeLabel.js b/src/module/timeLabel.js
index 84a58af..5e14612 100644
--- a/src/module/timeLabel.js
+++ b/src/module/timeLabel.js
@@ -10,7 +10,8 @@ const TOFIXED_DEICMAL = 1;
 export const getStepSizeOfYTicks = (maxTimeInSecond, numOfParts) => {
   const {unitToUse, timeValue} = getTimeUnitAndValueToUse(maxTimeInSecond);
   let resultStepSize;
-  resultStepSize = (timeValue * (1.125) / numOfParts);
+  const getLarger = 1 + (1 / (numOfParts - 1));
+  resultStepSize = (timeValue * getLarger / numOfParts);
 
   return {resultStepSize, unitToUse};
 }
diff --git a/src/views/Compare/Dashboard/index.vue b/src/views/Compare/Dashboard/index.vue
index e72643a..203bea7 100644
--- a/src/views/Compare/Dashboard/index.vue
+++ b/src/views/Compare/Dashboard/index.vue
@@ -407,7 +407,7 @@ export default {
           primeVueSetOption.scales.x.min = minX;
           primeVueSetOption.scales.x.max = maxX;
           primeVueSetOption.scales.y.ticks.callback = function (value, index, ticks) {
-            const {resultStepSize: YTickStepSize, unitToUse} = getStepSizeOfYTicks(maxY, ticks.length); // Stepsize only needs to be calculated once
+            const {resultStepSize: YTickStepSize, unitToUse} = getStepSizeOfYTicks(ticks[ticks.length - 1].value, ticks.length); // Stepsize only needs to be calculated once
             return getYTicksByIndex(YTickStepSize, index, unitToUse); 
           }
           break;
@@ -891,7 +891,7 @@ export default {
               padding: 8,
               callback: function (value, index, ticks) {
                 // resultStepSize: Y 軸一個刻度的高度的純數值部分，unitToUse則可能是 d,h,m,s 四者之一
-                const {resultStepSize, unitToUse} = getStepSizeOfYTicks(maxY, ticks.length);
+                const {resultStepSize, unitToUse} = getStepSizeOfYTicks(ticks[ticks.length - 1].value, ticks.length);
                 return getYTicksByIndex(resultStepSize, index, unitToUse);
               },
             }
diff --git a/src/views/Discover/Performance/index.vue b/src/views/Discover/Performance/index.vue
index 5fc1963..0af9db8 100644
--- a/src/views/Discover/Performance/index.vue
+++ b/src/views/Discover/Performance/index.vue
@@ -411,7 +411,7 @@ export default {
           primeVueSetOption.scales.y.ticks.callback = function (value, index, ticks) {
             // resultStepSize: Y 軸一個刻度的高度的純數值部分，unitToUse則可能是 d,h,m,s 四者之一
             // ticks.length是動態由 PrimeVue 決定的，例如可能是 6 或是 8
-            const {resultStepSize, unitToUse} = getStepSizeOfYTicks(maxY, ticks.length);
+            const {resultStepSize, unitToUse} = getStepSizeOfYTicks(ticks[ticks.length - 1].value, ticks.length);
             return getYTicksByIndex(resultStepSize, index, unitToUse);
           };
           primeVueSetOption.scales.y.ticks.stepSize = resultStepSize;
@@ -882,7 +882,7 @@ export default {
               padding: 8,
               callback: function (value, index, ticks) {
                 // resultStepSize: Y 軸一個刻度的高度的純數值部分，unitToUse則可能是 d,h,m,s 四者之一
-                const {resultStepSize, unitToUse} = getStepSizeOfYTicks(maxY, ticks.length);
+                const {resultStepSize, unitToUse} = getStepSizeOfYTicks(ticks[ticks.length - 1].value, ticks.length);
                 return getYTicksByIndex(resultStepSize, index, unitToUse);
               },
             }
@@ -1026,7 +1026,7 @@ export default {
               padding: 8,
               callback: function (value, index, ticks) {
                 // resultStepSize: Y 軸一個刻度的高度的純數值部分，unitToUse則可能是 d,h,m,s 四者之一
-                const {resultStepSize, unitToUse} = getStepSizeOfYTicks(maxY, ticks.length);
+                const {resultStepSize, unitToUse} = getStepSizeOfYTicks(ticks[ticks.length - 1].value, ticks.length);
                 return getYTicksByIndex(resultStepSize, index, unitToUse);
               },
             }