add plot_config to startegy interface properly

freqtrade/plot/plotting.py

@@ -1,6 +1,6 @@
 import logging
 from pathlib import Path
-from typing import Any, Dict, List, Union
+from typing import Any, Dict, List
 
 import pandas as pd
 from freqtrade.configuration import TimeRange
@@ -13,8 +13,6 @@ from freqtrade.resolvers import StrategyResolver
 logger = logging.getLogger(__name__)
 
 
-IndicatorType = Union[List[str], Dict[str, Dict]]
-
 try:
     from plotly.subplots import make_subplots
     from plotly.offline import plot
@@ -151,7 +149,8 @@ def plot_trades(fig, trades: pd.DataFrame) -> make_subplots:
     return fig
 
 
-def create_plotconfig(indicators1: List[str], indicators2: List[str], plot_config: Dict[str, Dict]) -> Dict[str, Dict]:
+def create_plotconfig(indicators1: List[str], indicators2: List[str],
+                      plot_config: Dict[str, Dict]) -> Dict[str, Dict]:
     """
     Combines indicators 1 and indicators 2 into plot_config if necessary
     :param indicators1: List containing Main plot indicators

freqtrade/strategy/interface.py

@@ -112,7 +112,8 @@ class IStrategy(ABC):
     dp: Optional[DataProvider] = None
     wallets: Optional[Wallets] = None
 
-    plot_config: Dict
+    # Definition of plot_config. See plotting documentation for more details.
+    plot_config: Dict = {}
 
     def __init__(self, config: dict) -> None:
         self.config = config