refactored code. before cleaning

lib/pt_strategy/trading_strategy.py

@@ -26,6 +26,7 @@ class PtResearchStrategy:
     pt_mkt_data_: PtMarketData
 
     trades_: List[pd.DataFrame]
+    predictions_: pd.DataFrame
 
     def __init__(
         self,
@@ -41,6 +42,7 @@ class PtResearchStrategy:
         self.trades_ = []
         self.trading_pair_ = TradingPair(config=config, instruments=instruments)
         self.model_data_policy_ = ModelDataPolicy.create(config)
+        self.predictions_ = pd.DataFrame()
 
         import copy
 
@@ -83,6 +85,7 @@ class PtResearchStrategy:
             prediction = self.trading_pair_.run(
                 market_data_df, self.model_data_policy_.advance()
             )
+            self.predictions_ = pd.concat([self.predictions_, prediction.to_df()], ignore_index=True)
             assert prediction is not None
 
             trades = self._create_trades(