Store position data

Breakout/main.py

@@ -1,5 +1,6 @@
 from AlgorithmImports import QCAlgorithm, Resolution, BrokerageName, OrderProperties, TimeInForce
 from datetime import timedelta, datetime
+from Breakout.position import Position
 from indicators import SymbolIndicators
 
 
@@ -55,7 +56,7 @@ def OnData(self, data):
             if not self.symbol_map[symbol].ready:
                 continue
             if self.sell_signal(symbol, data):
-                self.Liquidate(symbol)
+                self.sell(symbol)
             if self.symbol_map[symbol].uptrending and not self.ActiveSecurities[symbol].Invested:
                 symbols.append(symbol)
         self.live_log("processing on data")
@@ -85,8 +86,14 @@ def buy(self, symbol, order_tag=None, order_properties=None, price=None):
             else:
                 self.live_log(f"Market order {symbol.Value} {position_value}: {order_tag or 'no tag'}")
                 self.MarketOrder(symbol, position_size, tag=order_tag)
+            self.ObjectStore.save(symbol.Value, Position(self.Time))
         else:
             self.live_log(f"insufficient cash ({self.Portfolio.Cash}) to purchase {symbol.Value}")
+
+    def sell(self, symbol):
+        self.Liquidate(symbol)
+        if self.ObjectStore.ContainsKey(symbol.Value):
+            self.ObjectStore.Delete(symbol.Value)
 
     def good_for_a_day(self):
         """

Breakout/position.py

@@ -0,0 +1,34 @@
+import datetime
+from dateutil.parser import parse
+import json
+
+
+class Position:
+    """
+    Stores information relative to an open position.
+    Intended to be persisted in object storage as a json string.
+    """
+    start: datetime.datetime
+
+    def __init__(self, start: datetime.datetime = None) -> None:
+        self.start = start
+
+    def __str__(self) -> str:
+        return json.dumps({
+            "start": str(self.start),
+        })
+
+
+def position_from_str(content: str) -> Position:
+    """
+    Method for parsing a Position from object storage.
+
+    Args:
+        content (str): the Position content as a json string.
+
+    Returns:
+        Position: The position class.
+    """
+    content = json.loads(content)
+    content['start'] = parse(content['start'])
+    return Position(**content)