1 files changed, 5 insertions, 0 deletions
diff --git a/trade.py b/trade.py
index 3ceaeb6..d031622 100644
--- a/trade.py
+++ b/trade.py
@@ -1,5 +1,10 @@
+from decimal import Decimal
+
 class Trade:
     def __init__(self, amount: float, total_cost: float, date: str) -> None:
+        if amount <= 0 or total_cost <= 0:
+            raise ValueError("Amount and total cost must be > 0")
+
         self.__amount: float = amount
         self.__total_cost: float = total_cost
         self.__date: str = date