diff --git a/MyEnums.mqh b/MyEnums.mqh
index 2926a55..42b9488 100644
--- a/MyEnums.mqh
+++ b/MyEnums.mqh
@@ -37,10 +37,13 @@ enum  MULTI_SYM_MODE{
     MULTI_SYM_FX_28     // FX 28 Majors
 };
 
+// used to generate in and out of sample data sets
 enum MODE_SPLIT_DATA{
     NO_SPLIT,   
     ODD_YEARS,  
     EVEN_YEARS,
-    // ODD_MONTHS,
-    // EVEN_MONTHS 
+    ODD_MONTHS,
+    EVEN_MONTHS,
+    ODD_WEEKS,
+    EVEN_WEEKS     
 };
\ No newline at end of file
diff --git a/MyFunctions.mqh b/MyFunctions.mqh
index 80ac591..31e9809 100644
--- a/MyFunctions.mqh
+++ b/MyFunctions.mqh
@@ -46,37 +46,59 @@ bool MyFunctions::in_test_period(MODE_SPLIT_DATA data_split_method){
    string string_tc = TimeToString(TimeCurrent());
    ushort u_sep = StringGetCharacter(".",0); 
    int split_string = StringSplit(string_tc, u_sep, result); 
+   bool odd_year = int(result[0]) % 2;
+   bool odd_month = int(result[1]) % 2;  
+
+   // get week of the year. rough estimate can be late the first week of jan:
+   MqlDateTime dt;
+   TimeToStruct(TimeCurrent(),dt); 
+   int iDay  = (dt.day_of_week + 6 ) % 7 + 1;        // convert day to standard index (1=Mon,...,7=Sun)
+   int iWeek = (dt.day_of_year - iDay + 10 ) / 7;    // calculate standard week number
    
-   bool even_year = int(result[0]) % 2;
-   // bool even_month = int(result[1]) % 2; // need to remove the leading 0 for this to work.    
+   bool odd_week = iWeek % 2;     
+
 
    if(data_split_method==NO_SPLIT){
       return true;
    }
 
    if(data_split_method==ODD_YEARS){
-      if (!even_year){
+      if (odd_year){              
          return true;
       }
    }
 
    if(data_split_method==EVEN_YEARS){
-      if (even_year){
+      if (!odd_year){      
          return true;
       }
    }
 
-   // if(data_split_method==ODD_MONTHS){
-   //    if (!even_month){
-   //       return true;
-   //    }
-   // }
+   if(data_split_method==ODD_MONTHS){
+      if (odd_month){   
+         return true;
+      }
+   }
 
-   // if(data_split_method==EVEN_MONTHS){
-   //    if (even_month){
-   //       return true;
-   //    }
-   // }
+   if(data_split_method==EVEN_MONTHS){
+
+      if (!odd_month){
+         return true;
+      }
+   }
+
+   if(data_split_method==ODD_WEEKS){
+      if (odd_week){     
+         return true;
+      }
+   }
+
+   if(data_split_method==EVEN_WEEKS){
+
+      if (!odd_week){
+         return true;
+      }
+   }
 
    return false;
 }
@@ -92,7 +114,6 @@ bool MyFunctions::is_new_daily_bar(string symbol, datetime start_time){
     return false;
 }
 
-
 double MyFunctions::period_high(string symbol, int periods, int shift){
    
    double highs[];