From e1eedc063b58476fb6e9bb97ad1353f4eb24bf7c Mon Sep 17 00:00:00 2001
From: "vn.py" <xiaoyou.chen@foxmail.com>
Date: Fri, 1 Nov 2019 15:39:10 +0800
Subject: [PATCH] [Fix] typo

---
 vnpy/app/spread_trading/base.py       | 2 +-
 vnpy/app/spread_trading/ui/widget.py  | 2 +-
 vnpy/gateway/bitmex/bitmex_gateway.py | 4 ++++
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/vnpy/app/spread_trading/base.py b/vnpy/app/spread_trading/base.py
index d7b460ea..3e3b5805 100644
--- a/vnpy/app/spread_trading/base.py
+++ b/vnpy/app/spread_trading/base.py
@@ -136,7 +136,7 @@ class SpreadData:
         self.active_leg: LegData = None
         self.passive_legs: List[LegData] = []
 
-        self.min_volume = 0.1
+        self.min_volume = 0.001
 
         # For calculating spread price
         self.price_multipliers: Dict[str, int] = price_multipliers
diff --git a/vnpy/app/spread_trading/ui/widget.py b/vnpy/app/spread_trading/ui/widget.py
index 0b512e19..b0eef051 100644
--- a/vnpy/app/spread_trading/ui/widget.py
+++ b/vnpy/app/spread_trading/ui/widget.py
@@ -228,7 +228,7 @@ class SpreadAlgoWidget(QtWidgets.QFrame):
         )
 
         self.offset_combo = QtWidgets.QComboBox()
-        self.offset_combo.addItem(
+        self.offset_combo.addItems(
             [Offset.NONE.value, Offset.OPEN.value, Offset.CLOSE.value]
         )
 
diff --git a/vnpy/gateway/bitmex/bitmex_gateway.py b/vnpy/gateway/bitmex/bitmex_gateway.py
index 8b168a8c..ac143694 100644
--- a/vnpy/gateway/bitmex/bitmex_gateway.py
+++ b/vnpy/gateway/bitmex/bitmex_gateway.py
@@ -744,6 +744,10 @@ class BitmexWebsocketApi(WebsocketClient):
             gateway_name=self.gateway_name,
         )
 
+        # avgEntryPrice may be None instead of 0 sometimes
+        if position.price is None:
+            position.price = 0
+
         self.gateway.on_position(position)
 
     def on_account(self, d):