Fix timeframe conversion

Author: MDUYN

investing_algorithm_framework/domain/models/time_frame.py

@@ -36,6 +36,15 @@ def from_string(value: str):
                     if value == entry.value.replace("H", "h"):
                         return entry
 
+                # For hour timeframes compare with and without H
+                if "d" in entry.value:
+
+                    if value == entry.value:
+                        return entry
+
+                    if value == entry.value.replace("d", "D"):
+                        return entry
+
                 if value == entry.value:
                     return entry
 

investing_algorithm_framework/domain/services/market_data_sources.py

@@ -243,9 +243,7 @@ def __init__(
             symbol=symbol,
         )
         self._window_size = window_size
-
-        if timeframe is not None:
-            self._timeframe = TimeFrame.from_value(timeframe)
+        self._timeframe = timeframe
 
     @property
     def timeframe(self):
@@ -266,6 +264,16 @@ def create_end_date(self, start_date, timeframe, window_size):
     def window_size(self):
         return self._window_size
 
+    @window_size.setter
+    def window_size(self, value):
+
+        if not isinstance(value, int):
+            raise OperationalException(
+                "Window size must be an integer"
+            )
+
+        self._window_size = value
+
     def get_date_ranges(
         self,
         start_date: datetime,

investing_algorithm_framework/infrastructure/models/market_data_sources/ccxt.py

@@ -119,7 +119,7 @@ def prepare_data(
             market_service.config = config
             ohlcv = market_service.get_ohlcv(
                 symbol=self.symbol,
-                time_frame=self.timeframe.value,
+                time_frame=self.timeframe,
                 from_timestamp=backtest_data_start_date,
                 to_timestamp=backtest_end_date,
                 market=self.market
@@ -142,7 +142,7 @@ def _create_file_path(self):
         OHLCV_{symbol}_{market}_{timeframe}_{start_date}_{end_date}.csv
         """
         symbol_string = self.symbol.replace("/", "-")
-        time_frame_string = self.timeframe.value.replace("_", "")
+        time_frame_string = self.timeframe.replace("_", "")
         backtest_data_start_date = \
             self.backtest_data_start_date.strftime(DATETIME_FORMAT_BACKTESTING)
         backtest_data_end_date = \

investing_algorithm_framework/infrastructure/services/market_service/ccxt_market_service.py

@@ -356,7 +356,6 @@ def get_closed_orders(
     def get_ohlcv(
         self, symbol, time_frame, from_timestamp, market, to_timestamp=None
     ) -> pl.DataFrame:
-        time_frame = TimeFrame.from_value(time_frame).value
 
         if self.config is not None and "DATETIME_FORMAT" in self.config:
             datetime_format = self.config["DATETIME_FORMAT"]
@@ -414,6 +413,10 @@ def get_ohlcv(
         # Combine the Series into a DataFrame with given column names
         df = pl.DataFrame(data)
 
+        # Check if width is 0
+        if len(df) == 0:
+            return df
+
         # Assign column names after DataFrame creation
         df.columns = col_names
         return df
@@ -427,7 +430,6 @@ def get_ohlcvs(
         to_timestamp=None
     ) -> Dict[str, pl.DataFrame]:
         ohlcvs = {}
-        time_frame = TimeFrame.from_value(time_frame).value
 
         for symbol in symbols: