Fix: Plotting error in core/plot.py by correcting MACD Histogram column name from 'macdh_12_26_9' to 'macdhist_12_26_9'.

core/plot.py

@@ -76,7 +76,7 @@ def plot_indicators(df, ticker):
                 row=3, col=1
             )
             fig.add_trace(
-                go.Bar(x=df.index, y=df["macdh_12_26_9"], name="MACD Hist", marker_color="gray"),
+                go.Bar(x=df.index, y=df["macdhist_12_26_9"], name="MACD Hist", marker_color="gray"),
                 row=3, col=1
             )
         if 'rsi_14' in df: