diff --git a/vnpy/app/spread_trading/algo.py b/vnpy/app/spread_trading/algo.py
index 39ca2ecf..9e0066ed 100644
--- a/vnpy/app/spread_trading/algo.py
+++ b/vnpy/app/spread_trading/algo.py
@@ -87,7 +87,7 @@ class SpreadTakerAlgo(SpreadAlgoTemplate):
             spread_order_volume = max(spread_order_volume, spread_volume_left)
 
         # Calculate active leg order volume
-        leg_order_volume = self.spread.caculate_leg_volume(
+        leg_order_volume = self.spread.calculate_leg_volume(
             self.spread.active_leg.vt_symbol,
             spread_order_volume
         )
@@ -114,7 +114,7 @@ class SpreadTakerAlgo(SpreadAlgoTemplate):
         # Calculate passive leg target volume and do hedge
         for leg in self.spread.passive_legs:
             passive_traded = self.leg_orders[leg.vt_symbol]
-            passive_target = self.spread.caculate_leg_volume(
+            passive_target = self.spread.calculate_leg_volume(
                 leg.vt_symbol,
                 hedge_volume
             )
diff --git a/vnpy/app/spread_trading/engine.py b/vnpy/app/spread_trading/engine.py
index 8bcfb831..42690280 100644
--- a/vnpy/app/spread_trading/engine.py
+++ b/vnpy/app/spread_trading/engine.py
@@ -84,28 +84,9 @@ class SpreadDataEngine:
         """"""
         self.load_setting()
         self.register_event()
-        self.test()
 
         self.write_log("价差数据引擎启动成功")
 
-    def test(self):
-        """"""
-        name = "test"
-        leg_settings = [
-            {
-                "vt_symbol": "XBTUSD.BITMEX",
-                "price_multiplier": 1,
-                "trading_multiplier": 1
-            },
-            {
-                "vt_symbol": "XBTZ19.BITMEX",
-                "price_multiplier": -1,
-                "trading_multiplier": -1
-            }
-        ]
-        active_symbol = "XBTUSD.BITMEX"
-        self.add_spread(name, leg_settings, active_symbol, True)
-
     def load_setting(self) -> None:
         """"""
         setting = load_json(self.setting_filename)
diff --git a/vnpy/app/spread_trading/ui/widget.py b/vnpy/app/spread_trading/ui/widget.py
index ebfe8977..062e6221 100644
--- a/vnpy/app/spread_trading/ui/widget.py
+++ b/vnpy/app/spread_trading/ui/widget.py
@@ -209,7 +209,6 @@ class SpreadAlgoDialog(QtWidgets.QDialog):
         )
 
         float_validator = QtGui.QDoubleValidator()
-        float_validator.setBottom(0)
 
         self.price_line = QtWidgets.QLineEdit()
         self.price_line.setValidator(float_validator)