diff --git a/3D/Chart3DCandles.h b/3D/Chart3DCandles.h
index 9f1cc40b9..ea421b0e5 100644
--- a/3D/Chart3DCandles.h
+++ b/3D/Chart3DCandles.h
@@ -25,6 +25,7 @@
  * 3D chart candles renderer.
  */
 
+#include "../Chart.define.h"
 #include "Chart3DType.h"
 #include "Cube.h"
 #include "Device.h"
diff --git a/3D/Mesh.h b/3D/Mesh.h
index 0ee82c0dc..719b33aff 100644
--- a/3D/Mesh.h
+++ b/3D/Mesh.h
@@ -45,8 +45,13 @@ struct PointEntry {
   T point;
   long key;
 
+  // Default constructor.
   PointEntry() {}
 
+  // Copy constructor.
+  PointEntry(const PointEntry<T>& r) : point(r.point), key(r.key) {}
+
+  // Constructor.
   PointEntry(const T& _point) {
     point = _point;
     key = MakeKey(_point.Position.x, _point.Position.y, _point.Position.z);
diff --git a/3D/Vertex.h b/3D/Vertex.h
index 8466fa312..f9b84851e 100644
--- a/3D/Vertex.h
+++ b/3D/Vertex.h
@@ -8,11 +8,18 @@ struct Vertex {
   DXVector3 Normal;
   DXColor Color;
 
-  Vertex() {
-    Color.r = 1.0f;
-    Color.g = 1.0f;
-    Color.b = 1.0f;
-    Color.a = 1.0f;
+  // Default constructor.
+  Vertex(float r = 1, float g = 1, float b = 1, float a = 1) {
+    Color.r = r;
+    Color.g = g;
+    Color.b = b;
+    Color.a = a;
+  }
+
+  Vertex(const Vertex &r) {
+    Position = r.Position;
+    Normal = r.Normal;
+    Color = r.Color;
   }
 
   static const ShaderVertexLayout Layout[3];
diff --git a/Account/Account.struct.h b/Account/Account.struct.h
index efae51d51..4d90c2a94 100644
--- a/Account/Account.struct.h
+++ b/Account/Account.struct.h
@@ -48,6 +48,21 @@ struct AccountEntry {
   double margin_used;
   double margin_free;
   double margin_avail;
+
+  // Default constructor.
+  AccountEntry() {}
+
+  // Constructor.
+  AccountEntry(const AccountEntry& r)
+      : dtime(r.dtime),
+        balance(r.balance),
+        credit(r.credit),
+        equity(r.equity),
+        profit(r.profit),
+        margin_used(r.margin_used),
+        margin_free(r.margin_free),
+        margin_avail(r.margin_avail) {}
+
   // Serializers.
   void SerializeStub(int _n1 = 1, int _n2 = 1, int _n3 = 1, int _n4 = 1, int _n5 = 1) {}
   SerializerNodeType Serialize(Serializer& _s) {
diff --git a/BufferFXT.mqh b/BufferFXT.mqh
index 61a372f85..a60dc0c02 100644
--- a/BufferFXT.mqh
+++ b/BufferFXT.mqh
@@ -73,6 +73,20 @@ struct BufferFXTEntry {
   int flag;  // Flag to launch an expert (0 - bar will be modified, but the expert will not be launched).
 
  public:
+  // Default constructor
+  BufferFXTEntry() {}
+
+  // Copy constructor
+  BufferFXTEntry(const BufferFXTEntry &r)
+      : otm(r.otm),
+        open(r.open),
+        high(r.high),
+        low(r.low),
+        close(r.close),
+        volume(r.volume),
+        ctm(r.ctm),
+        flag(r.flag) {}
+
   bool operator==(const BufferFXTEntry &_s) {
     // @fixme
     return false;
diff --git a/BufferStruct.mqh b/BufferStruct.mqh
index 216a9f15a..a43c06074 100644
--- a/BufferStruct.mqh
+++ b/BufferStruct.mqh
@@ -64,7 +64,7 @@ class BufferStruct : public DictStruct<long, TStruct> {
    * Constructor.
    */
   BufferStruct() : min(INT_MAX), max(INT_MIN) { THIS_ATTR SetOverflowListener(BufferStructOverflowListener, 10); }
-  BufferStruct(BufferStruct& _right) : min(INT_MAX), max(INT_MIN) {
+  BufferStruct(const BufferStruct& _right) : min(INT_MAX), max(INT_MIN) {
     this = _right;
     THIS_ATTR SetOverflowListener(BufferStructOverflowListener, 10);
   }
diff --git a/Chart.struct.h b/Chart.struct.h
index a4100f935..e0c04a219 100644
--- a/Chart.struct.h
+++ b/Chart.struct.h
@@ -51,6 +51,7 @@ struct ChartEntry {
   // Constructors.
   ChartEntry() {}
   ChartEntry(const BarEntry& _bar) { SetBar(_bar); }
+  ChartEntry(const ChartEntry& _r) { SetBar(_r.bar); }
   // Getters.
   BarEntry GetBar() { return bar; }
   string ToCSV() { return StringFormat("%s", bar.ToCSV()); }
diff --git a/Database.mqh b/Database.mqh
index 2a4bcc82b..80571651c 100644
--- a/Database.mqh
+++ b/Database.mqh
@@ -109,6 +109,7 @@ struct DbSymbolInfoEntry : public SymbolInfoEntry {
   DatabaseTableSchema schema;
   // Constructors.
   DbSymbolInfoEntry() { DefineSchema(); }
+  DbSymbolInfoEntry(const DbSymbolInfoEntry &r) { schema = r.schema; }
   DbSymbolInfoEntry(const MqlTick &_tick, const string _symbol = NULL) : SymbolInfoEntry(_tick, _symbol) {
     DefineSchema();
   }
diff --git a/DateTime.entry.h b/DateTime.entry.h
index c99d8d27f..539ec5a45 100644
--- a/DateTime.entry.h
+++ b/DateTime.entry.h
@@ -33,6 +33,7 @@
 // Includes.
 #include "DateTime.static.h"
 #include "PlatformTime.h"
+#include "Std.h"
 
 struct DateTimeEntry : MqlDateTime {
   int week_of_year;
diff --git a/Indicators/Indi_RSI.mqh b/Indicators/Indi_RSI.mqh
index 3b401778e..5aacd6181 100644
--- a/Indicators/Indi_RSI.mqh
+++ b/Indicators/Indi_RSI.mqh
@@ -79,6 +79,11 @@ struct IndiRSIParams : IndicatorParams {
 struct RSIGainLossData {
   double avg_gain;
   double avg_loss;
+  // Default constructor.
+  RSIGainLossData() {}
+
+  // Copy constructor.
+  RSIGainLossData(const RSIGainLossData &r) : avg_gain(r.avg_gain), avg_loss(r.avg_loss) {}
 };
 
 /**
diff --git a/Strategy.mqh b/Strategy.mqh
index d52f5168a..961808aa7 100644
--- a/Strategy.mqh
+++ b/Strategy.mqh
@@ -259,7 +259,7 @@ class Strategy : public Taskable<DataParamEntry> {
    * Gets strategy entry.
    */
   StgEntry GetEntry() {
-    StgEntry _entry = {};
+    StgEntry _entry;
     for (ENUM_STRATEGY_STATS_PERIOD _p = EA_STATS_DAILY; _p < FINAL_ENUM_STRATEGY_STATS_PERIOD; _p++) {
       _entry.SetStats(stats_period[(int)_p], _p);
     }
@@ -988,9 +988,10 @@ class Strategy : public Taskable<DataParamEntry> {
       if (METHOD(_method, 1)) _result |= _result || !IsTrend(_cmd);                      // 2
       if (METHOD(_method, 2)) _result |= _result || !trade REF_DEREF IsPivot(_cmd);      // 4
       if (METHOD(_method, 3))
-        _result |= _result || Open[_shift] > High[_shift + 1] || Open[_shift] < Low[_shift + 1];  // 8
-      if (METHOD(_method, 4)) _result |= _result || trade REF_DEREF IsPeak(_cmd);                 // 16
-      if (METHOD(_method, 5)) _result |= _result || trade REF_DEREF HasOrderBetter(_cmd);         // 32
+        _result |= _result || iOpen(Symbol(), PERIOD_CURRENT, _shift) > iHigh(Symbol(), PERIOD_CURRENT, _shift + 1) ||
+                   iOpen(Symbol(), PERIOD_CURRENT, _shift) < iLow(Symbol(), PERIOD_CURRENT, _shift + 1);  // 8
+      if (METHOD(_method, 4)) _result |= _result || trade REF_DEREF IsPeak(_cmd);                         // 16
+      if (METHOD(_method, 5)) _result |= _result || trade REF_DEREF HasOrderBetter(_cmd);                 // 32
       /*
       if (METHOD(_method, 6))
         _result |=
diff --git a/Strategy.struct.h b/Strategy.struct.h
index 5c4eef27f..19dce3bcd 100644
--- a/Strategy.struct.h
+++ b/Strategy.struct.h
@@ -436,6 +436,15 @@ struct StgStatsPeriod {
 struct StgEntry {
   unsigned short signals;
   StgStatsPeriod stats_period[FINAL_ENUM_STRATEGY_STATS_PERIOD];
+  // Default constructor.
+  StgEntry() {}
+
+  // Copy constructor.
+  StgEntry(const StgEntry &r) : signals(r.signals) {
+    for (int i = 0; i < FINAL_ENUM_STRATEGY_STATS_PERIOD; ++i) {
+      stats_period[i] = r.stats_period[i];
+    }
+  }
   string ToCSV() {
     return StringFormat("%s,%s,%s,%s", stats_period[(int)EA_STATS_DAILY].ToCSV(),
                         stats_period[(int)EA_STATS_WEEKLY].ToCSV(), stats_period[(int)EA_STATS_MONTHLY].ToCSV(),
diff --git a/tests/DatabaseTest.mq5 b/tests/DatabaseTest.mq5
index c37b969c9..2cbc81ddf 100644
--- a/tests/DatabaseTest.mq5
+++ b/tests/DatabaseTest.mq5
@@ -45,13 +45,13 @@ int OnInit() {
   db = new Database(":memory:", DATABASE_OPEN_MEMORY);
 
   // Create Table1 table.
-  DatabaseTableColumnEntry columns[] = {
-      {"SYMBOL", TYPE_CHAR, DATABASE_COLUMN_FLAG_NONE, 6},
-      {"BID", TYPE_DOUBLE},
-      {"ASK", TYPE_DOUBLE},
-      {"VOLUME", TYPE_INT, DATABASE_COLUMN_FLAG_IS_NULL},
-      {"COMMENT", TYPE_STRING, DATABASE_COLUMN_FLAG_IS_NULL},
-  };
+  ARRAY(DatabaseTableColumnEntry, columns);
+  ArrayPushObject(columns, DatabaseTableColumnEntry("SYMBOL", TYPE_CHAR, DATABASE_COLUMN_FLAG_NONE, 6));
+  ArrayPushObject(columns, DatabaseTableColumnEntry("BID", TYPE_DOUBLE));
+  ArrayPushObject(columns, DatabaseTableColumnEntry("ASK", TYPE_DOUBLE));
+  ArrayPushObject(columns, DatabaseTableColumnEntry("VOLUME", TYPE_INT, DATABASE_COLUMN_FLAG_IS_NULL));
+  ArrayPushObject(columns, DatabaseTableColumnEntry("COMMENT", TYPE_STRING, DATABASE_COLUMN_FLAG_IS_NULL));
+
   DatabaseTableSchema schema = columns;
   assertTrueOrFail(db.CreateTable("Table1", schema), "Cannot create table! Error: " + (string)_LastError);
   DatabasePrint(db.GetHandle(), "PRAGMA TABLE_INFO(Table1);", 0);