diff --git a/bfxbot/models.py b/bfxbot/models.py
index 5ee0e12..094dd2d 100644
--- a/bfxbot/models.py
+++ b/bfxbot/models.py
@@ -79,18 +79,11 @@ class Event:
 class PositionWrapper:
     def __init__(self, position: Position):
         self.position: Position = position
-        self.stop_percentage: float = None
         self.state: PositionState = PositionState.LOSS
 
-    def get_stop_percentage(self) -> float:
-        return self.stop_percentage
-
     def get_state(self) -> PositionState:
         return self.state
 
-    def set_stop_percentage(self, perc: float):
-        self.stop_percentage = perc
-
     def set_state(self, state: PositionState):
         if not isinstance(state, PositionState):
             return
@@ -128,13 +121,13 @@ class SymbolStatus:
     def all_ticks(self) -> List[int]:
         return [x for x in range(1, self.current_tick + 1)]
 
-    def last_events(self, n) -> List[Event]:
-        return self.events[-n:]
-
-    def last_positions(self) -> List[PositionWrapper]:
+    def current_positions(self) -> List[PositionWrapper]:
         return self.positions[self.current_tick]
 
-    def previous_position_w(self, pid: int) -> PositionWrapper:
+    def current_price(self):
+        return self.prices[self.current_tick]
+
+    def previous_pw(self, pid: int) -> PositionWrapper:
         if self.current_tick == 1:
             return None
 
@@ -167,6 +160,13 @@ class SymbolStatus:
 
 
 class Strategy:
+    """
+    Defines a list of events on a new tick
+    """
+
+    def on_new_tick(self, ss: SymbolStatus) -> List[Event]:
+        pass
+
     """
     Defines new position state and events after tick.
     """