adding the option to resolver

freqtrade/constants.py

@@ -73,6 +73,7 @@ CONF_SCHEMA = {
         'trailing_stop': {'type': 'boolean'},
         'trailing_stop_positive': {'type': 'number', 'minimum': 0, 'maximum': 1},
         'trailing_stop_positive_offset': {'type': 'number', 'minimum': 0, 'maximum': 1},
+        'trailing_only_offset_is_reached': {'type': 'boolean'},
         'unfilledtimeout': {
             'type': 'object',
             'properties': {

freqtrade/resolvers/strategy_resolver.py

@@ -52,6 +52,7 @@ class StrategyResolver(IResolver):
                       ("trailing_stop", None, False),
                       ("trailing_stop_positive", None, False),
                       ("trailing_stop_positive_offset", 0.0, False),
+                      ("trailing_only_offset_is_reached", None, False),
                       ("process_only_new_candles", None, False),
                       ("order_types", None, False),
                       ("order_time_in_force", None, False),

freqtrade/strategy/interface.py

@@ -73,6 +73,7 @@ class IStrategy(ABC):
     trailing_stop: bool = False
     trailing_stop_positive: float
     trailing_stop_positive_offset: float
+    trailing_only_offset_is_reached = False
 
     # associated ticker interval
     ticker_interval: str