added trailing stop

bfxbot/bfxbot.py

@@ -65,7 +65,7 @@ class BfxBot:
 
             # emitting new tick event
             ## TODO: handle _on_new_tick() from Strategy
-            await self.__status[symbol].__add_event__(Event(EventKind.NEW_TICK, self.__ticker.current_tick))
+            await self.__status[symbol].add_event(Event(EventKind.NEW_TICK, self.__ticker.current_tick))
 
     async def best_position_closing_price(self, position_id: int) -> Optional[float]:
         pw: Optional[PositionWrapper] = self.__position_wrapper_from_id(position_id)

bfxbot/models.py

@@ -120,6 +120,10 @@ class SymbolStatus:
         self.current_tick: int = 1
         self.strategy: Strategy = strategy
 
+    async def add_event(self, event: Event):
+        self.events.append(event)
+        await self.eh.call_event(self, event)
+
     def add_order(self, order: Order):
         if self.strategy:
             self.strategy.order_on_new_tick(order, self)
@@ -162,10 +166,6 @@ class SymbolStatus:
     def set_tick_price(self, tick, price):
         self.prices[tick] = price
 
-    async def __add_event__(self, event: Event):
-        self.events.append(event)
-        await self.eh.call_event(self, event)
-
     async def __apply_strategy_to_position__(self, position: Position):
         if not self.strategy:
             return
@@ -185,7 +185,7 @@ class SymbolStatus:
         for e in events:
             if not isinstance(e, Event):
                 raise ValueError
-            await self.__add_event__(e)
+            await self.add_event__(e)
 
         return pw
 
@@ -239,15 +239,15 @@ class EventHandler:
         if state in self.state_handlers:
             for h in self.state_handlers[state]:
                 if inspect.iscoroutinefunction(h):
-                    await h(status)
+                    await h(pw, status)
                 else:
-                    h(status)
+                    h(pw, status)
 
         for h in self.any_state:
             if inspect.iscoroutinefunction(h):
-                await h(status)
+                await h(pw, status)
             else:
-                h(status)
+                h(pw, status)
 
     def on_event(self, kind: EventKind):
         value = kind.value

main.py

@@ -12,7 +12,7 @@ from flask_socketio import SocketIO
 
 from bfxbot import BfxBot
 from bfxbot.currency import Symbol
-from bfxbot.models import PositionWrapper, SymbolStatus, Event, EventKind
+from bfxbot.models import PositionWrapper, SymbolStatus, Event, EventKind, PositionState
 from bfxbot.utils import pos_to_json
 from strategy import TrailingStopStrategy
 
@@ -35,7 +35,8 @@ app = Flask(__name__)
 socketio = SocketIO(app, async_mode="threading")
 bot = BfxBot(api_key=API_KEY, api_secret=API_SECRET,
              symbols=[Symbol.BTC], tick_duration=20)
-bot.set_strategy(Symbol.BTC, TrailingStopStrategy())
+strategy = TrailingStopStrategy()
+bot.set_strategy(Symbol.BTC, strategy)
 btc_eh = bot.symbol_event_handler(Symbol.BTC)
 
 # initializing and starting bot on other thread
@@ -92,6 +93,16 @@ def on_close_position(event: Event, _):
     loop.run_until_complete(bot.close_position(event.metadata.position_id))
 
 
+@btc_eh.on_position_state(PositionState.PROFIT)
+async def on_state_min_profit(pw: PositionWrapper, ss: SymbolStatus):
+    await strategy.update_stop_percentage(pw, ss)
+
+
+@btc_eh.on_position_state(PositionState.MINIMUM_PROFIT)
+async def on_state_min_profit(pw: PositionWrapper, ss: SymbolStatus):
+    await strategy.update_stop_percentage(pw, ss)
+
+
 @btc_eh.on_event(EventKind.NEW_TICK)
 def on_new_tick(event: Event, status: SymbolStatus):
     tick = event.tick
@@ -106,6 +117,7 @@ def on_new_tick(event: Event, status: SymbolStatus):
 
 @btc_eh.on_any_event()
 def on_any_event(event: Event, _):
+    await strategy
     socketio.emit("new_event", {
         "tick": event.tick,
         "kind": event.kind.name

strategy.py

@@ -51,6 +51,9 @@ class TrailingStopStrategy(Strategy):
 
     TRAILING_STOP = SquaredTrailingStop(Point(MIN_PROFIT_PERC, MIN_PROFIT_PERC / 3 * 2), Point(GOOD_PROFIT_PERC, 0.1))
 
+    def __init__(self):
+        self.stop_percentage: float = None
+
     def position_on_new_tick(self, position: Position, ss: SymbolStatus) -> (PositionState, List[Event]):
         events = []
 
@@ -88,3 +91,21 @@ class TrailingStopStrategy(Strategy):
             events.append(Event(EventKind.CLOSE_POSITION, ss.current_tick, event_metadata))
 
         return pw, events
+
+    async def update_stop_percentage(self, pw: PositionWrapper, ss: SymbolStatus):
+        current_pl_perc = pw.net_profit_loss_percentage()
+
+        # set stop percentage for first time
+        if not self.stop_percentage:
+            await ss.add_event(Event(EventKind.TRAILING_STOP_SET, ss.current_tick))
+
+            self.stop_percentage = current_pl_perc - self.TRAILING_STOP.y(current_pl_perc)
+
+            return
+
+        # moving trailing stop
+        if current_pl_perc - self.TRAILING_STOP.y(pw.net_profit_loss_percentage()) > self.stop_percentage:
+            await ss.add_event(Event(EventKind.TRAILING_STOP_MOVED, ss.current_tick))
+            self.stop_percentage = current_pl_perc - self.TRAILING_STOP.y(current_pl_perc)
+
+        return