From afd488556a2b086624ae1fdb3dcb398a0f1ad902 Mon Sep 17 00:00:00 2001
From: 1122455801 <zhangyangffff@gmail.com>
Date: Sun, 26 May 2019 10:59:18 +0800
Subject: [PATCH 1/2] Create grid_algo.py

---
 vnpy/app/algo_trading/algos/grid_algo.py | 127 +++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 vnpy/app/algo_trading/algos/grid_algo.py

diff --git a/vnpy/app/algo_trading/algos/grid_algo.py b/vnpy/app/algo_trading/algos/grid_algo.py
new file mode 100644
index 00000000..914def91
--- /dev/null
+++ b/vnpy/app/algo_trading/algos/grid_algo.py
@@ -0,0 +1,127 @@
+from vnpy.trader.constant import Direction
+from vnpy.trader.object import TradeData, OrderData, TickData
+from vnpy.trader.engine import BaseEngine
+from vnpy.app.algo_trading import AlgoTemplate
+import math
+
+
+class GridAlgo(AlgoTemplate):
+    """"""
+
+    display_name = "Grid 网格"
+
+    default_setting = {
+        "vt_symbol": "",
+        "price": 0.0,
+        "trade_count": 0.0,
+        "step_price": 0.0,
+        "step_volume": 0,
+        "interval": 0,
+    }
+
+    variables = [
+        "last_pos",       
+        "timer_count",
+        "vt_orderid",
+        "traded",
+        "count"
+    ]
+
+    def __init__(
+        self,
+        algo_engine: BaseEngine,
+        algo_name: str,
+        setting: dict
+    ):
+        """"""
+        super().__init__(algo_engine, algo_name, setting)
+
+        # Parameters
+        self.vt_symbol = setting["vt_symbol"]
+        self.price = setting["price"]
+        self.trade_count = setting["trade_count"]
+        self.step_price = setting["step_price"]
+        self.step_volume = setting["step_volume"]
+        self.interval = setting["interval"]
+
+        # Variables
+        self.vt_orderid = ""
+        self.count = 0
+        self.traded = 0
+        self.last_pos = 0
+        self.timer_count = 0
+        self.last_tick = None
+
+        self.subscribe(self.vt_symbol)
+        self.put_parameters_event()
+        self.put_variables_event()
+
+    def on_tick(self, tick: TickData):
+        """"""
+        self.last_tick = tick
+    
+    def on_timer(self):
+        """"""
+        if not self.last_tick:
+            return
+
+        self.timer_count += 1
+        if self.timer_count < self.interval:
+            self.put_variables_event()
+            return        
+        self.timer_count = 0
+        
+        if self.vt_orderid:
+            self.cancel_all()        
+
+        # Calculate target volume to buy
+        target_buy_distance = (self.price - self.last_tick.ask_price_1) / self.step_price
+        target_buy_position = math.floor(target_buy_distance) * self.step_volume
+        target_buy_volume = target_buy_position - self.last_pos
+
+        # Buy when price dropping
+        if target_buy_volume > 0:
+            self.vt_orderid = self.buy(
+                self.vt_symbol,
+                self.last_tick.ask_price_1,
+                min(target_buy_volume, self.last_tick.ask_volume_1)
+            )
+        
+        # Calculate target volume to sell
+        target_sell_distance = (self.price - self.last_tick.bid_price_1) / self.step_price
+        target_sell_position = math.ceil(target_sell_distance) * self.step_volume
+        target_sell_volume = self.last_pos - target_sell_position
+
+        # Sell when price rising
+        if target_sell_volume > 0:
+            self.vt_orderid = self.sell(
+                self.vt_symbol,
+                self.last_tick.bid_price_1,
+                min(target_sell_volume, self.last_tick.bid_volume_1)
+            )
+
+    def on_order(self, order: OrderData):
+        """"""
+        if not order.is_active():
+            self.vt_orderid = ""
+            self.put_variables_event()
+
+    def on_trade(self, trade: TradeData):
+        """"""
+        self.last_pos = self.update_last_pos(self.last_pos, trade)
+
+        self.traded += trade.volume
+        self.count += 1
+        if self.count >= self.trade_count:
+            self.write_log(f"已交易数量：{self.traded}，总成交次数：{self.count}")
+            self.stop()
+        else:
+            self.put_variables_event()
+   
+    def update_last_pos(self, pos, trade: TradeData):
+        """"""
+        if trade.direction == Direction.LONG:
+            pos += trade.volume
+        else:
+            pos -= trade.volume
+        return pos

From 69642716987abba26cd330b7aa089cd911849ec6 Mon Sep 17 00:00:00 2001
From: 1122455801 <zhangyangffff@gmail.com>
Date: Sun, 26 May 2019 11:05:54 +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 81949739..1bfbd20c 100644
--- a/vnpy/app/algo_trading/engine.py
+++ b/vnpy/app/algo_trading/engine.py
@@ -48,12 +48,14 @@ class AlgoEngine(BaseEngine):
         from .algos.sniper_algo import SniperAlgo
         from .algos.stop_algo import StopAlgo
         from .algos.best_limit_algo import BestLimitAlgo
+        from .algos.grid_algo import GridAlgo
 
         self.add_algo_template(TwapAlgo)
         self.add_algo_template(IcebergAlgo)
         self.add_algo_template(SniperAlgo)
         self.add_algo_template(StopAlgo)
         self.add_algo_template(BestLimitAlgo)
+        self.add_algo_template(GridAlgo)
 
     def add_algo_template(self, template: AlgoTemplate):
         """"""