From ad4471dfc4210e34b66c65293f71f7ba4936beba Mon Sep 17 00:00:00 2001
From: 1122455801 <zhangyangffff@gmail.com>
Date: Wed, 5 Jun 2019 13:55:47 +0800
Subject: [PATCH 1/2] Create arbitrage_algo.py

---
 vnpy/app/algo_trading/algos/arbitrage_algo.py | 161 ++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 vnpy/app/algo_trading/algos/arbitrage_algo.py

diff --git a/vnpy/app/algo_trading/algos/arbitrage_algo.py b/vnpy/app/algo_trading/algos/arbitrage_algo.py
new file mode 100644
index 00000000..02d83786
--- /dev/null
+++ b/vnpy/app/algo_trading/algos/arbitrage_algo.py
@@ -0,0 +1,161 @@
+from vnpy.trader.constant import Direction
+from vnpy.trader.object import TradeData, OrderData
+from vnpy.trader.engine import BaseEngine
+
+from vnpy.app.algo_trading import AlgoTemplate
+
+
+class ArbitrageAlgo(AlgoTemplate):
+    """"""
+
+    display_name = "Arbitrage 套利"
+
+    default_setting = {
+        "active_vt_symbol": "",
+        "passive_vt_symbol": "",        
+        "spread_up": 0.0,
+        "spread_down": 0.0,
+        "max_pos": 0,
+        "interval": 0,
+    }
+
+    variables = [
+        "timer_count",
+        "active_vt_orderid",
+        "passive_vt_orderid",
+        "net_pos",
+        "acum_pos"
+    ]
+
+    def __init__(
+        self,
+        algo_engine: BaseEngine,
+        algo_name: str,
+        setting: dict
+    ):
+        """"""
+        super().__init__(algo_engine, algo_name, setting)
+
+        # Parameters
+        self.active_vt_symbol = setting["active_vt_symbol"]
+        self.passive_vt_symbol = setting["passive_vt_symbol"]
+        self.spread_up = setting["spread_up"]
+        self.spread_down = setting["spread_down"]
+        self.max_pos = setting["max_pos"]
+        self.interval = setting["interval"]
+       
+        # Variables
+        self.active_vt_orderid = ""
+        self.passive_vt_orderid = ""
+        self.net_pos = 0
+        self.acum_pos = 0
+        self.timer_count = 0
+
+        self.subscribe(self.active_vt_symbol)
+        self.subscribe(self.passive_vt_symbol)
+        self.put_parameters_event()
+        self.put_variables_event()
+
+    def on_stop(self):
+        """"""
+        self.write_log("停止算法")
+
+    def on_order(self, order: OrderData):
+        """"""
+        if order.vt_symbol == self.active_vt_symbol:
+            if not order.is_active():
+                self.active_vt_orderid = ""
+        elif order.vt_symbol == self.passive_vt_symbol:
+            if not order.is_active():
+                self.passive_vt_orderid = ""
+        self.put_variables_event()
+
+    def on_trade(self, trade: TradeData):
+        """"""
+        # Update net position volume
+        if trade.direction == Direction.LONG:
+            self.net_pos += trade.volume
+        else:
+            self.net_pos -= trade.volume
+
+        # Update active symbol position           
+        if trade.vt_symbol == self.active_vt_symbol:
+            if trade.direction == Direction.LONG:
+                self.acum_pos += trade.volume
+            else:
+                self.acum_pos -= trade.volume
+
+        # Hedge if active symbol traded     
+        if trade.vt_symbol == self.active_vt_symbol:
+            self.hedge()
+        
+        self.put_variables_event()
+
+    def on_timer(self):
+        """"""
+        self.timer_count += 1
+        if self.timer_count < self.interval:
+            self.put_variables_event()
+            return
+        self.timer_count = 0
+
+        if self.active_vt_orderid or self.passive_vt_orderid:
+            self.cancel_all()
+            return
+        
+        if self.net_pos:
+            self.hedge()
+            return
+      
+        active_tick = self.get_tick(self.active_vt_symbol)
+        passive_tick = self.get_tick(self.passive_vt_symbol)
+        if not active_tick or not passive_tick:
+            return
+
+        # Calculate spread
+        spread_bid_price = active_tick.bid_price_1 - passive_tick.ask_price_1
+        spread_ask_price = active_tick.ask_price_1 - passive_tick.bid_price_1
+
+        spread_bid_volume = min(active_tick.bid_volume_1, passive_tick.ask_volume_1)
+        spread_ask_volume = min(active_tick.ask_volume_1, passive_tick.bid_volume_1)
+
+        # Sell condition      
+        if spread_bid_price > self.spread_up:
+            if self.acum_pos <= -self.max_pos:
+                return
+            else:
+                self.active_vt_orderid = self.sell(
+                    self.active_vt_symbol,
+                    active_tick.bid_price_1,
+                    spread_bid_volume               
+                )
+
+        # Buy condition
+        elif spread_ask_price < -self.spread_down:
+            if self.acum_pos >= self.max_pos:
+                return
+            else:
+                self.active_vt_orderid = self.buy(
+                    self.active_vt_symbol,
+                    active_tick.ask_price_1,
+                    spread_ask_volume
+                )
+        self.put_variables_event()
+    
+    def hedge(self):
+        """"""
+        tick = self.get_tick(self.passive_vt_symbol)
+        volume = abs(self.net_pos)
+
+        if self.net_pos > 0:
+            self.passive_vt_orderid = self.sell(
+                self.passive_vt_symbol,
+                tick.bid_price_5,
+                volume
+            )
+        elif self.net_pos < 0:
+            self.passive_vt_orderid = self.buy(
+                self.passive_vt_symbol,
+                tick.ask_price_5,
+                volume
+            )

From 72d2ef95d0c7d5082d964aa3f479bff2c69f5af3 Mon Sep 17 00:00:00 2001
From: 1122455801 <zhangyangffff@gmail.com>
Date: Wed, 5 Jun 2019 13:55:51 +0800
Subject: [PATCH 2/2] Update engine.py

---
 vnpy/app/algo_trading/engine.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/vnpy/app/algo_trading/engine.py b/vnpy/app/algo_trading/engine.py
index a3dc7740..fb227231 100644
--- a/vnpy/app/algo_trading/engine.py
+++ b/vnpy/app/algo_trading/engine.py
@@ -50,6 +50,7 @@ class AlgoEngine(BaseEngine):
         from .algos.best_limit_algo import BestLimitAlgo
         from .algos.grid_algo import GridAlgo
         from .algos.dma_algo import DmaAlgo
+        from .algos.arbitrage_algo import ArbitrageAlgo
 
         self.add_algo_template(TwapAlgo)
         self.add_algo_template(IcebergAlgo)
@@ -58,6 +59,7 @@ class AlgoEngine(BaseEngine):
         self.add_algo_template(BestLimitAlgo)
         self.add_algo_template(GridAlgo)
         self.add_algo_template(DmaAlgo)
+        self.add_algo_template(ArbitrageAlgo)
 
     def add_algo_template(self, template: AlgoTemplate):
         """"""