last works ...

Experts/x-test.x5ea.mq5

@@ -75,11 +75,22 @@ int OnInit()
         return INIT_PARAMETERS_INCORRECT;
     }
 
+    // //
+    // // Initial Providers ...
+    // if (!InitialProviders())
+    // {
+    //     return INIT_PARAMETERS_INCORRECT;
+    // }
+
     //
-    // Initial Providers ...
+    // Testing SymbolsTotal ...
-    if (!InitialProviders())
+    string symbols[];
-    {
+    int symbolsCount = FilterUSDSymbols(
-        return INIT_PARAMETERS_INCORRECT;
+        symbols
+    );
+    if (symbolsCount > 0) {
+        //
+        ArrayPrint(symbols);
     }
 
     //

Libraries/x-saherelm.common.lib.mq5

@@ -3141,6 +3141,197 @@ double GetAppliedPrice(
     return (0);
 }
 
+//
+// Symbols ...
+
+//
+// Retrieve Available Symbols ...
+int GetAllSymbols(
+    string &symbols[],            // Hold Result
+    bool onlyInWatchList = false, // Specified Retrieve only Symbols which in Watch List
+    bool forceClean = true        // Force To Clean Result Array
+)
+{
+    //
+    int result = 0;
+
+    //
+    if (forceClean)
+    {
+        Clean(symbols);
+    }
+
+    //
+    int beforeSize = ArraySize(symbols);
+
+    //
+    int symbolsCount = SymbolsTotal(onlyInWatchList);
+    if (symbolsCount <= 0)
+    {
+        return result;
+    }
+
+    //
+    for (int i = 0; i < symbolsCount; i++)
+    {
+        //
+        string iSymbol = SymbolName(
+            i,
+            onlyInWatchList
+            //
+        );
+        if (!IsValid(iSymbol))
+        {
+            continue;
+        }
+
+        //
+        Add(
+            iSymbol,
+            symbols
+            //
+        );
+    }
+
+    //
+    int afterSize = ArraySize(symbols);
+
+    //
+    result = afterSize - beforeSize;
+
+    //
+    return result;
+}
+
+//
+// This is a Global Way to Filter Symbols
+// you can pass Specific string as Query or a List String for Filtering ...
+int FilterSymbols(
+    string query,                 // Which Query to Search Symbol
+    string &symbols[],            // Hold Result
+    bool onlyInWatchList = false, // Specified Retrieve only Symbols which in Watch List
+    bool forceClean = true,       // Force To Clean Result Array
+    bool ignoreCase = true,       // Ignore Case
+    string querySeparator = ","   // If Provided means query is a COllection of Queries and need to be Splitted
+)
+{
+    //
+    int result = 0;
+
+    //
+    if (forceClean)
+    {
+        Clean(symbols);
+    }
+
+    //
+    if (!IsValid(query))
+    {
+        return result;
+    }
+
+    //
+    // Check Query is an String array or not ...
+    string mQueries[];
+    int queriesCount = 0;
+    if (IsValid(querySeparator) && Contains(querySeparator, query, true))
+    {
+        //
+        queriesCount = SplitContent(
+            mQueries,
+            query,
+            querySeparator
+            //
+        );
+    }
+
+    //
+    int beforeSize = ArraySize(symbols);
+
+    //
+    string allSymbols[];
+    int allSymbolsCount = GetAllSymbols(
+        allSymbols,
+        onlyInWatchList,
+        forceClean);
+    if (allSymbolsCount <= 0)
+    {
+        return result;
+    }
+
+    //
+    // Loop Through all Symbols ...
+    for (int i = 0; i < allSymbolsCount; i++)
+    {
+        //
+        string iSymbol = allSymbols[i];
+
+        //
+        bool isFilterPassed = false;
+        if (queriesCount == 0)
+        {
+            //
+            isFilterPassed = Contains(
+                query,
+                iSymbol,
+                ignoreCase
+                //
+            );
+        }
+        else if (queriesCount > 0)
+        {
+            //
+            isFilterPassed = Contains(
+                mQueries,
+                iSymbol,
+                ignoreCase
+                //
+            );
+        }
+
+        //
+        if (isFilterPassed)
+        {
+            //
+            Add(
+                iSymbol,
+                symbols
+                //
+            );
+        }
+    }
+
+    //
+    int afterSize = ArraySize(symbols);
+
+    //
+    result = afterSize - beforeSize;
+
+    //
+    return result;
+}
+
+//
+int FilterUSDSymbols(
+    string &symbols[],            // Hold Result
+    bool onlyInWatchList = false, // Specified Retrieve only Symbols which in Watch List
+    bool forceClean = true,       // Force To Clean Result Array
+    bool ignoreCase = true,       // Ignore Case
+    string querySeparator = ","   // If Provided means query is a COllection of Queries and need to be Splitted
+)
+{
+    //
+    return FilterSymbols(
+        "USD",
+        symbols,
+        onlyInWatchList,
+        forceClean,
+        ignoreCase,
+        querySeparator
+        //
+    );
+}
+
 //
 // Time / Date ...