diff --git a/chart.py b/chart.py
index 4e6ab58..d8c1102 100644
--- a/chart.py
+++ b/chart.py
@@ -224,17 +224,21 @@ class QuantChart:
 
         histogram = macd_chart.create_histogram(name=macd_name)
         hist_data = df[["time", macd_name]].copy()
-        hist_data['prev_value'] = hist_data[macd_name].shift(1)  
-        # 设置颜色逻辑  
+        hist_data["prev_value"] = hist_data[macd_name].shift(1)
+
+        # 设置颜色逻辑
         def get_histogram_color(row):
-            current, prev = row[macd_name], row['prev_value']
-            is_hollow = (current >= 0 and current < prev) or (current < 0 and current > prev)
+            current, prev = row[macd_name], row["prev_value"]
+            is_hollow = (current >= 0 and current < prev) or (
+                current < 0 and current > prev
+            )
             if current >= 0:
-                return "rgba(255, 0, 0, 0.3)" if is_hollow else "#ff0000"
+                return "rgba(255, 0, 0, 0.5)" if is_hollow else "#ff0000"
             else:
-                return "rgba(0, 255, 0, 0.3)" if is_hollow else "#00FF00"
-        hist_data["color"] = hist_data.apply(get_histogram_color, axis=1)  
-        hist_data = hist_data.drop('prev_value', axis=1)  
+                return "rgba(0, 255, 0, 0.5)" if is_hollow else "#00FF00"
+
+        hist_data["color"] = hist_data.apply(get_histogram_color, axis=1)
+        hist_data = hist_data.drop("prev_value", axis=1)
 
         histogram.set(hist_data)