diff --git a/PyMtApi5/client.py b/PyMtApi5/client.py
index 8ba92c17..d8c9bde4 100644
--- a/PyMtApi5/client.py
+++ b/PyMtApi5/client.py
@@ -72,6 +72,7 @@ class Mt5ApiApp:
             "ChartPeriod": self.process_chart_period,
             "ChartSetDouble": self.process_chart_set_double,
             "ChartSetInteger": self.process_chart_set_integer,
+            "ChartSetString": self.process_chart_set_string,
         }
 
     def on_disconnect(self, error_msg=None):
@@ -532,9 +533,18 @@ class Mt5ApiApp:
             print(f"! Invalid parameters for command ChartSetInteger: {parameters}")
             return
         prop_id = mt5enums.ENUM_CHART_PROPERTY_INTEGER(int(pieces[1]))
-        result = mtapi.chart_set_integer(int(pieces[0]), prop_id, float(pieces[2]))
+        result = mtapi.chart_set_integer(int(pieces[0]), prop_id, int(pieces[2]))
         print(f"> ChartSetInteger: response = {result}")
 
+    def process_chart_set_string(self, mtapi, parameters):
+        pieces = parameters.split(" ", 2)
+        if len(pieces) != 3 or not pieces[0] or not pieces[1] or not pieces[2]:
+            print(f"! Invalid parameters for command ChartSetString: {parameters}")
+            return
+        prop_id = mt5enums.ENUM_CHART_PROPERTY_STRING(int(pieces[1]))
+        result = mtapi.chart_set_string(int(pieces[0]), prop_id, pieces[2])
+        print(f"> ChartSetString: response = {result}")
+
     def mtapi_command_thread(self, mtapi):
         while mtapi.is_connected():
             filename = "client.cmd"
diff --git a/PyMtApi5/mt5apiclient.py b/PyMtApi5/mt5apiclient.py
index dbbc658c..0c29a657 100644
--- a/PyMtApi5/mt5apiclient.py
+++ b/PyMtApi5/mt5apiclient.py
@@ -534,6 +534,11 @@ class Mt5ApiClient:
         cmd_params = {"ChartId": chart_id, "PropId": prop_id, "Value": value}
         return self.__send_command(self.__get_default_expert(), Mt5CommandType.ChartSetInteger, cmd_params)
 
+    # ChartSetString
+    def chart_set_string(self, chart_id, prop_id: ENUM_CHART_PROPERTY_STRING, value):
+        cmd_params = {"ChartId": chart_id, "PropId": prop_id, "Value": value}
+        return self.__send_command(self.__get_default_expert(), Mt5CommandType.ChartSetString, cmd_params)
+
     # Private methods
 
     def __event_thread_func(self):