Update charts.py

charts.py

@@ -6,11 +6,10 @@ import pandas as pd
 def plot_candlestick(df):
     try:
         df = df.tail(50).copy()
-        fig, ax = plt.subplots(figsize=(8, 4))
-
         df['timestamp'] = pd.to_datetime(df['timestamp'])
 
-        for idx, row in df.iterrows():
+        fig, ax = plt.subplots(figsize=(8, 4))
+        for _, row in df.iterrows():
             color = 'green' if row['close'] >= row['open'] else 'red'
             ax.plot([row['timestamp'], row['timestamp']], [row['low'], row['high']], color='black')
             ax.plot([row['timestamp'], row['timestamp']], [row['open'], row['close']], color=color, linewidth=5)
@@ -18,7 +17,7 @@ def plot_candlestick(df):
         ax.xaxis.set_major_formatter(mdates.DateFormatter('%H:%M'))
         ax.xaxis.set_major_locator(mdates.AutoDateLocator())
         plt.xticks(rotation=45)
-        plt.title('Latest Candlestick Chart')
+        plt.title('Candlestick Chart (MEXC)')
         plt.tight_layout()
 
         buf = BytesIO()