Include pending orders in cash balance

Previously we ignored any pending orders, which could be credits or
debits, when doing cash management. Now we'll include those values as
well, which should result in a bit less churn.

thetagang/portfolio_manager.py

@@ -1755,6 +1755,21 @@ def vix_calls_should_be_closed() -> (
 
         console.print(Panel(Group(*to_print), title="VIX call hedging"))
 
+    def calc_pending_cash_balance(self):
+        return sum(
+            [
+                order.lmtPrice * order.totalQuantity * float(contract.multiplier)
+                for (contract, order) in self.orders
+                if order.action == "SELL"
+            ]
+        ) - sum(
+            [
+                order.lmtPrice * order.totalQuantity * float(contract.multiplier)
+                for (contract, order) in self.orders
+                if order.action == "BUY"
+            ]
+        )
+
     def do_cashman(self, account_summary, portfolio_positions):
         to_print = []
 
@@ -1769,6 +1784,7 @@ def inner_handler():
             buy_threshold = self.config["cash_management"]["buy_threshold"]
             sell_threshold = self.config["cash_management"]["sell_threshold"]
             cash_balance = math.floor(float(account_summary["TotalCashValue"].value))
+            pending_balance = self.calc_pending_cash_balance()
 
             try:
 
@@ -1791,14 +1807,16 @@ def make_order() -> tuple[Optional[Ticker], Optional[LimitOrder]]:
                         else self.config["orders"]["algo"]
                     )
 
-                    amount = cash_balance - target_cash_balance
+                    amount = cash_balance - (target_cash_balance + pending_balance)
                     price = ticker.ask if amount > 0 else ticker.bid
                     qty = amount // price
 
                     if qty > 0:
                         to_print.append(
-                            f"[green]cash_balance={cash_balance} which exceeds "
-                            f"(target_cash_balance + buy_threshold)={(target_cash_balance + buy_threshold)}"
+                            f"[green]cash_balance={dfmt(cash_balance)} which exceeds "
+                            f"(target_cash_balance + pending_balance + buy_threshold)="
+                            f"{(dfmt(target_cash_balance + pending_balance + buy_threshold))} "
+                            f"with pending_balance={dfmt(pending_balance)}"
                         )
                         to_print.append(
                             f"[green]Will buy {symbol} with qty={qty} shares at price={price}"
@@ -1809,8 +1827,10 @@ def make_order() -> tuple[Optional[Ticker], Optional[LimitOrder]]:
                         # subtract 1 to keep cash balance above target
                         qty -= 1
                         to_print.append(
-                            f"[green]cash_balance={cash_balance} which is less than "
-                            f"(target_cash_balance - sell_threshold)={(target_cash_balance - sell_threshold)}"
+                            f"[green]cash_balance={dfmt(cash_balance)} which is less than "
+                            f"(target_cash_balance + pending_balance - sell_threshold)="
+                            f"{(dfmt(target_cash_balance + pending_balance - sell_threshold))} "
+                            f"with pending_balance={dfmt(pending_balance)}"
                         )
                         if symbol not in portfolio_positions:
                             # we don't have any positions to sell