diff --git a/bot.py b/bot.py
index 29c1df3..8862a55 100644
--- a/bot.py
+++ b/bot.py
@@ -105,6 +105,7 @@ def on_trade(message: dict, orderman: OrderManager, state: StateManager):
         print("Good")
         if (p_vale + 1) * SZ + FEE < (p_valbz - 1) * SZ:
             orderman.buy("VALE", p_vale + 1, -SZ)
+            orderman.convert("VALE", SZ)
             orderman.sell("VALBZ", p_valbz - 1, SZ)
 
 
diff --git a/order.py b/order.py
index 9555a91..b7694b2 100644
--- a/order.py
+++ b/order.py
@@ -81,6 +81,19 @@ class OrderManager:
             price=price,
             size=size,
         )
+    def convert(self, symbol: str, size: int):
+        if symbol == "VALE":
+            target = "VALBZ"
+            self.future_positions["VALE"] -= size
+            self.future_positions["VALBZ"] += size
+            self.positions["VALE"] -= size
+            self.positions["VALBZ"] += size
+        return self.exchange.send_convert_message(
+            order_id=self._next_order(),
+            symbol=symbol,
+            dir="BUY",
+            size=size,
+        )
 
     def buy(self, symbol: str, price: int, size: int):
         return self._attempt_send(