MQL5: add timer-based command polling for live trading

MtApi5/MtApi5.csproj

@@ -3,7 +3,7 @@
 		<TargetFramework>net8.0</TargetFramework>
 		<ImplicitUsings>enable</ImplicitUsings>
 		<Nullable>enable</Nullable>
-		<VersionPrefix>2.0.0</VersionPrefix>
+		<VersionPrefix>2.0.1</VersionPrefix>
 		<BaseOutputPath>$(SolutionDir)build\products</BaseOutputPath>
 		<CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
 	</PropertyGroup>

mq5/MtApi5.mq5

@@ -32,6 +32,7 @@ enum LockTickType
 };
 
 input int Port = 8228;
+input int CommandPollingIntervalMs = 100; // command polling interval in live trading, ms (10-1000)
 input LockTickType BacktestingLockTicks = NO_LOCK;
 input group           "Disable Events "
 input bool Enable_OnBookEvent = true;                 
@@ -106,13 +107,14 @@ void OnTick()
          (BacktestingLockTicks == LOCK_EVERY_CANDLE && lastbar_time_changed))
       {
          _is_ticks_locked = true;
-         
+
          MtLockTickEvent lock_tick_event(symbol);
          SendMtEvent(ON_LOCK_TICKS_EVENT, lock_tick_event);
       }
-
-      OnTimer();
    }
+
+   //--- Process pending commands on every tick (supplements timer in live mode)
+   OnTimer();
 }
 
 void  OnTradeTransaction( 
@@ -446,31 +448,44 @@ int init()
 
    //--- Backtesting mode
     if (IsTesting())
-    {      
+    {
        Print("Waiting on remote client...");
        //wait for command (BacktestingReady) from remote side to be ready for work
        while(!IsRemoteReadyForTesting)
        {
           executeCommand();
-          
+
           //This section uses a while loop to simulate Sleep() during Backtest.
           unsigned int viSleepUntilTick = GetTickCount() + 100; //100 milliseconds
-          while(GetTickCount() < viSleepUntilTick) 
+          while(GetTickCount() < viSleepUntilTick)
           {
              //Do absolutely nothing. Just loop until the desired tick is reached.
           }
        }
     }
-   //--- 
+    else
+    {
+       //--- In live trading, poll for commands via timer (configurable interval)
+       int polling_interval = CommandPollingIntervalMs;
+       if (polling_interval < 10) polling_interval = 10;
+       if (polling_interval > 1000) polling_interval = 1000;
+       if (polling_interval != CommandPollingIntervalMs)
+          PrintFormat("[WARNING] CommandPollingIntervalMs=%d out of range, clamped to %d", CommandPollingIntervalMs, polling_interval);
+       if (!EventSetMillisecondTimer(polling_interval))
+          Print("[WARNING] Failed to set millisecond timer for command polling");
+    }
+   //---
 
    return (0);
 }
 
-int deinit() 
+int deinit()
 {
-   if (isCrashed == 0) 
+   EventKillTimer();
+
+   if (isCrashed == 0)
    {
-      if (!deinitExpert(ExpertHandle, _error)) 
+      if (!deinitExpert(ExpertHandle, _error))
       {
          MessageBox(_error, "MtApi", 0);
          isCrashed = true;