XAUUSD Expert Advisor MT5: Complete MQL5 Guide with Code & Stats
The complete guide to building and running a XAUUSD Expert Advisor in MetaTrader 5. Covers EA architecture, MQL5 code, backtest methodology, and live performance expectations for gold trading.
Historical test results
Past performance is not indicative of future results. Backtest statistics are based on historical data and do not guarantee future profits. Trading involves significant risk of loss. This content is for educational purposes only and does not constitute financial advice.
Strategy logic
Entry conditions
Trend-following logic using 50/200 EMA crossover on H1 timeframe. Enter long on golden cross with ADX above 25 confirming trend strength. Enter short on death cross with same ADX confirmation. Minimum ATR threshold filters low-volatility periods.
Exit conditions
Fixed risk-reward of 1:2 with ATR-based stop loss calculation. Trailing stop engages after price moves 1x ATR in profit direction. Emergency close triggers if daily drawdown exceeds 5% of account balance.
MQL5 Expert Advisor Code
//+------------------------------------------------------------------+
//| XAUUSD Expert Advisor - Trend Following H1 |
//| Pineify.app |
//+------------------------------------------------------------------+
#property copyright "Pineify.app"
#property version "1.00"
input int MagicNumber = 456789;
input double RiskPercent = 1.0;
input int EMA_Fast = 50;
input int EMA_Slow = 200;
input int ADX_Period = 14;
input double ADX_Min = 25.0;
input int ATR_Period = 14;
int emaFastH, emaSlowH, adxH, atrH;
double emaFast[], emaSlow[], adxMain[], atrBuf[];
int OnInit() {
emaFastH = iMA(_Symbol, PERIOD_H1, EMA_Fast, 0, MODE_EMA, PRICE_CLOSE);
emaSlowH = iMA(_Symbol, PERIOD_H1, EMA_Slow, 0, MODE_EMA, PRICE_CLOSE);
adxH = iADX(_Symbol, PERIOD_H1, ADX_Period);
atrH = iATR(_Symbol, PERIOD_H1, ATR_Period);
ArraySetAsSeries(emaFast, true); ArraySetAsSeries(emaSlow, true);
ArraySetAsSeries(adxMain, true); ArraySetAsSeries(atrBuf, true);
return INIT_SUCCEEDED;
}
void OnDeinit(const int reason) {
IndicatorRelease(emaFastH); IndicatorRelease(emaSlowH);
IndicatorRelease(adxH); IndicatorRelease(atrH);
}
void OnTick() {
if (!IsNewBar(PERIOD_H1)) return;
CopyBuffer(emaFastH, 0, 0, 3, emaFast);
CopyBuffer(emaSlowH, 0, 0, 3, emaSlow);
CopyBuffer(adxH, 0, 0, 3, adxMain);
CopyBuffer(atrH, 0, 0, 3, atrBuf);
if (CountPositions(MagicNumber) > 0) return;
bool adxConfirm = adxMain[1] >= ADX_Min;
double atr = atrBuf[1];
double sl = atr * 1.0;
double tp = atr * 2.0;
double lots = CalcLots(sl);
bool goldenCross = emaFast[2] < emaSlow[2] && emaFast[1] > emaSlow[1];
bool deathCross = emaFast[2] > emaSlow[2] && emaFast[1] < emaSlow[1];
if (goldenCross && adxConfirm) OpenTrade(ORDER_TYPE_BUY, lots, sl, tp, MagicNumber);
if (deathCross && adxConfirm) OpenTrade(ORDER_TYPE_SELL, lots, sl, tp, MagicNumber);
}
bool IsNewBar(ENUM_TIMEFRAMES tf) {
static datetime last = 0;
datetime cur = iTime(_Symbol, tf, 0);
if (cur != last) { last = cur; return true; } return false;
}
double CalcLots(double slPts) {
double tv = SymbolInfoDouble(_Symbol, SYMBOL_TRADE_TICK_VALUE);
double ts = SymbolInfoDouble(_Symbol, SYMBOL_TRADE_TICK_SIZE);
double bal = AccountInfoDouble(ACCOUNT_BALANCE);
double lot = (bal * RiskPercent / 100.0) / (slPts / ts * tv);
double stp = SymbolInfoDouble(_Symbol, SYMBOL_VOLUME_STEP);
return MathMax(SymbolInfoDouble(_Symbol, SYMBOL_VOLUME_MIN),
MathMin(SymbolInfoDouble(_Symbol, SYMBOL_VOLUME_MAX),
MathFloor(lot / stp) * stp));
}
int CountPositions(int magic) {
int n = 0;
for (int i = PositionsTotal()-1; i >= 0; i--) {
ulong t = PositionGetTicket(i);
if (PositionSelectByTicket(t) && PositionGetString(POSITION_SYMBOL)==_Symbol &&
(int)PositionGetInteger(POSITION_MAGIC)==magic) n++;
} return n;
}
void OpenTrade(ENUM_ORDER_TYPE type, double lots, double sl, double tp, int magic) {
MqlTradeRequest req={}; MqlTradeResult res={};
req.action=TRADE_ACTION_DEAL; req.symbol=_Symbol; req.volume=lots; req.type=type;
req.price=(type==ORDER_TYPE_BUY)?SymbolInfoDouble(_Symbol,SYMBOL_ASK):SymbolInfoDouble(_Symbol,SYMBOL_BID);
req.sl=(type==ORDER_TYPE_BUY)?req.price-sl:req.price+sl;
req.tp=(type==ORDER_TYPE_BUY)?req.price+tp:req.price-tp;
req.magic=magic; req.comment="Pineify XAUUSD"; req.type_filling=ORDER_FILLING_IOC;
OrderSend(req,res);
}Copy this code into MetaEditor, save it in the MQL5/Experts folder, and compile with F7.
Generate a custom XAUUSD trend-following EA
Describe the entry, exit, position, order, and risk rules you want. Pineify generates editable MQL5 source code that you can inspect and compile in MetaEditor.
Pine Script vs MQL5: Same Strategy, Different Platforms
| Aspect | Pine Script (TradingView) | MQL5 (MetaTrader 5) |
|---|---|---|
| Execution | Series evaluated on chart updates | Event handlers with explicit buffers |
| Deployment | Runs in TradingView with alerts | Runs in the MT5 terminal or on a VPS |
| Broker access | Via TradingView broker integration | Direct broker connectivity |
| Backtesting | Strategy Tester for strategy scripts | Strategy Tester for Expert Advisors |
| Code complexity | Simpler, functional syntax | C++-like, more powerful |
The calculation can be implemented on either platform, but the runtime model and buffer APIs differ. Read the Pine Script Supertrend reference before porting logic between them.
Frequently Asked Questions
Related MQL5 pages
Risk and testing note
Past performance is not indicative of future results. Backtest statistics are based on historical data and do not guarantee future profits. Trading involves significant risk of loss. This content is for educational purposes only and does not constitute financial advice.