Pine Script to MQL5 Converter

How the conversion works

1. 1. Paste your Pine Script

   Copy the strategy from TradingView (Pine v5) and paste it into the box above.

2. 2. Choose MQL5 as the target

   The converter opens with your code filled in and MQL5 selected. cTrader C# is also available as a target.

3. 3. Run the optional platform check

   For supported platforms the check shows whether MetaTrader accepts the translated output. If it is unavailable or flags an issue, review the result and the strategy before you go on.

4. 4. Review, compile and test

   Open the .mq5 file in MetaEditor, compile it, compare the signals with TradingView and test on a demo account before any live use.

What maps directly and what needs a review

Indicator names are the easy part. The bar you read, when an order is sent and how a position is closed are where converted strategies drift.

The full mapping, with the common mistakes and a verification checklist, is in the Pine Script to MQL5 guide.

Example: a signal-only EA you can compare with the chart

This EA reads the last two closed bars of a 10 and 30 period EMA and prints a cross. It places no trades, so you can check the signals against TradingView first. It uses shift 1 and 2, runs once per bar and reads data only after the copy succeeded.

int fastHandle = INVALID_HANDLE;
int slowHandle = INVALID_HANDLE;
datetime lastProcessedBar = 0;

int OnInit()
{
   fastHandle = iMA(_Symbol, _Period, 10, 0, MODE_EMA, PRICE_CLOSE);
   slowHandle = iMA(_Symbol, _Period, 30, 0, MODE_EMA, PRICE_CLOSE);
   if (fastHandle == INVALID_HANDLE || slowHandle == INVALID_HANDLE)
      return INIT_FAILED;
   return INIT_SUCCEEDED;
}

void OnTick()
{
   const datetime currentBar = iTime(_Symbol, _Period, 0);
   if (currentBar == 0 || currentBar == lastProcessedBar)
      return;

   double fast[2], slow[2];
   if (CopyBuffer(fastHandle, 0, 1, 2, fast) != 2 ||
       CopyBuffer(slowHandle, 0, 1, 2, slow) != 2)
      return;

   lastProcessedBar = currentBar;
   if (fast[0] <= slow[0] && fast[1] > slow[1]) Print("Closed-bar EMA cross up.");
   if (fast[0] >= slow[0] && fast[1] < slow[1]) Print("Closed-bar EMA cross down.");
}

After the conversion

• Error Fixer: paste the code and the compiler messages to get a minimal fix and an explanation of each problem.
• Code Review: check for a missing stop loss, risky lot sizes and repainting. Free during the early-bird period.
• Verification notes: what the optional platform check does and does not establish.

Frequently asked questions