fixed the nr of mech calls

tabs/daily_graphs.py

@@ -73,8 +73,8 @@ def plot_daily_metrics(
     """Plots the trade metrics."""
 
     if metric_name == "mech calls":
-        metric_name = "mech_calls"
-        column_name = "num_mech_calls"
+        metric_name = "nr_mech_calls"
+        column_name = "nr_mech_calls"
         yaxis_title = "Nr of mech calls per trade"
     elif metric_name == "ROI":
         column_name = "roi"