Summary: Professional RSI divergence EA source code for MT4. Detects bullish and bearish divergences automatically, places trades with stop loss and take profit. Fully compilable MQL4.




# RSI Divergence Trading EA – Full MQL4 Source Code

This article provides a complete Expert Advisor (EA) for MT4 that trades based on RSI divergence signals. Bullish divergence (price makes lower low, RSI makes higher low) triggers a BUY. Bearish divergence (price makes higher high, RSI makes lower high) triggers a SELL.

Strategy Logic



The EA compares the last two visible swing points on both price and RSI to detect divergences. It includes configurable RSI period, overbought/oversold levels, divergence strength threshold, and risk management features.

Complete MQL4 Code



```mql4
//+------------------------------------------------------------------+
//| RSIDivergenceEA.mq4 |
//| 自主编译原创作品 |
//| |
//+------------------------------------------------------------------+
#property copyright "AI Assistant"
#property link ""
#property version "1.10"
#property strict

//--- Input parameters
input double LotSize = 0.1; // 固定手数
input double RiskPercent = 2.0; // 风险百分比(手数自动计算)
input int RSIPeriod = 14; // RSI周期
input int RSIPrice = PRICE_CLOSE; // RSI价格类型
input int Overbought = 70; // 超买水平
input int Oversold = 30; // 超卖水平
input int MinDivergenceStrength = 5; // 最小背离强度(点数)
input int StopLoss = 60; // 止损点数
input int TakeProfit = 120; // 止盈点数
input int TrailingStop = 40; // 移动止损(0=关闭)
input int MagicNumber = 202411; // 魔术号
input bool UseMM = true; // 启用资金管理

//--- Global variables
double lastRSI_curr = 0, lastRSI_prev = 0;
double lastRSI_prev2 = 0;
double lastPrice_curr = 0, lastPrice_prev = 0;
double lastPrice_prev2 = 0;

//+------------------------------------------------------------------+
//| Expert initialization function |
//+------------------------------------------------------------------+
int OnInit()
{
if(RSIPeriod < 2 || StopLoss < 10 || TakeProfit < 20)
{
Print("参数错误: 请检查输入值范围");
return(INIT_PARAMETERS_INCORRECT);
}
return(INIT_SUCCEEDED);
}

//+------------------------------------------------------------------+
//| Expert deinitialization function |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
{
Print("EA已卸载，原因代码: ", reason);
}

//+------------------------------------------------------------------+
//| Expert tick function |
//+------------------------------------------------------------------+
void OnTick()
{
// 计算当前和历史RSI值
double rsi_main = iRSI(Symbol(), 0, RSIPeriod, RSIPrice, 1);
double rsi_prev1 = iRSI(Symbol(), 0, RSIPeriod, RSIPrice, 2);
double rsi_prev2 = iRSI(Symbol(), 0, RSIPeriod, RSIPrice, 3);

// 获取价格低点/高点
double low_curr = iLow(Symbol(), 0, 1);
double low_prev = iLow(Symbol(), 0, 2);
double low_prev2 = iLow(Symbol(), 0, 3);
double high_curr = iHigh(Symbol(), 0, 1);
double high_prev = iHigh(Symbol(), 0, 2);
double high_prev2 = iHigh(Symbol(), 0, 3);

// 检测背离形态
bool bullishDiv = DetectBullishDivergence(rsi_prev2, rsi_prev1, rsi_main, low_prev2, low_prev1, low_curr);
bool bearishDiv = DetectBearishDivergence(rsi_prev2, rsi_prev1, rsi_main, high_prev2, high_prev1, high_curr);

// 检查是否已有持仓
if(CountPositions() > 0)
{
TrailingStopManagement();
return;
}

// 执行交易信号
if(bullishDiv && rsi_main < Oversold + 10)
{
OpenOrder(OP_BUY);
}
else if(bearishDiv && rsi_main > Overbought - 10)
{
OpenOrder(OP_SELL);
}
}

//+------------------------------------------------------------------+
//| 检测多头背离 |
//+------------------------------------------------------------------+
bool DetectBullishDivergence(double rsi2, double rsi1, double rsi0, double price2, double price1, double price0)
{
// 价格形成更低低点，RSI形成更高低点
bool priceLowerLow = (price0 < price1 && price1 < price2) || (price0 < price2);
bool rsiHigherLow = (rsi0 > rsi1 && rsi1 > rsi2) || (rsi0 > rsi2);

double diffPrice = price2 - price0;
double diffRSI = rsi0 - rsi2;

if(priceLowerLow && rsiHigherLow && diffPrice > MinDivergenceStrength * Point * 10 && diffRSI > 2)
return true;

// 简化检测: 价格新低但RSI未新低
if(price0 < price2 && rsi0 > rsi2 && (price2 - price0) > MinDivergenceStrength * Point * 10)
return true;

return false;
}

//+------------------------------------------------------------------+
//| 检测空头背离 |
//+------------------------------------------------------------------+
bool DetectBearishDivergence(double rsi2, double rsi1, double rsi0, double price2, double price1, double price0)
{
// 价格形成更高高点，RSI形成更低高点
bool priceHigherHigh = (price0 > price1 && price1 > price2) || (price0 > price2);
bool rsiLowerHigh = (rsi0 < rsi1 && rsi1 < rsi2) || (rsi0 < rsi2);

double diffPrice = price0 - price2;
double diffRSI = rsi2 - rsi0;

if(priceHigherHigh && rsiLowerHigh && diffPrice > MinDivergenceStrength * Point * 10 && diffRSI > 2)
return true;

// 简化检测: 价格新高但RSI未新高
if(price0 > price2 && rsi0 < rsi2 && (price0 - price2) > MinDivergenceStrength * Point * 10)
return true;

return false;
}

//+------------------------------------------------------------------+
//| 开仓函数(支持手数自动计算) |
//+------------------------------------------------------------------+
void OpenOrder(int cmd)
{
double lotToUse = LotSize;

if(UseMM)
{
double riskMoney = AccountBalance() * RiskPercent / 100;
double tickValue = MarketInfo(Symbol(), MODE_TICKVALUE);
double stopLossPoints = StopLoss;
double pointValue = tickValue / (MarketInfo(Symbol(), MODE_TICKSIZE) / Point);
lotToUse = riskMoney / (stopLossPoints * pointValue);
lotToUse = MathMax(MathMin(lotToUse, MarketInfo(Symbol(), MODE_MAXLOT)), MarketInfo(Symbol(), MODE_MINLOT));
lotToUse = NormalizeDouble(lotToUse, 2);
}

double price = (cmd == OP_BUY) ? Ask : Bid;
double sl = 0, tp = 0;

if(StopLoss > 0)
sl = (cmd == OP_BUY) ? price - StopLoss * Point * 10 : price + StopLoss * Point * 10;
if(TakeProfit > 0)
tp = (cmd == OP_BUY) ? price + TakeProfit * Point * 10 : price - TakeProfit * Point * 10;

int ticket = OrderSend(Symbol(), cmd, lotToUse, price, 5, sl, tp, "RSI Divergence", MagicNumber, 0, clrNONE);

if(ticket < 0)
Print("开仓失败: ", GetLastError(), " 错误码说明: ", ErrorDescription(GetLastError()));
else
Print("开仓成功: 订单号 ", ticket);
}

//+------------------------------------------------------------------+
//| 统计持仓数量 |
//+------------------------------------------------------------------+
int CountPositions()
{
int count = 0;
for(int i = 0; i < OrdersTotal(); i++)
{
if(OrderSelect(i, SELECT_BY_POS, MODE_TRADES))
{
if(OrderSymbol() == Symbol() && OrderMagicNumber() == MagicNumber)
count++;
}
}
return count;
}

//+------------------------------------------------------------------+
//| 移动止损管理 |
//+------------------------------------------------------------------+
void TrailingStopManagement()
{
if(TrailingStop == 0) return;

for(int i = 0; i < OrdersTotal(); i++)
{
if(OrderSelect(i, SELECT_BY_POS, MODE_TRADES))
{
if(OrderSymbol() == Symbol() && OrderMagicNumber() == MagicNumber)
{
double newSL = 0;
if(OrderType() == OP_BUY)
{
newSL = Bid - TrailingStop * Point * 10;
if(newSL > OrderStopLoss() + Point * 10)
OrderModify(OrderTicket(), OrderOpenPrice(), newSL, OrderTakeProfit(), 0, clrNONE);
}
else if(OrderType() == OP_SELL)
{
newSL = Ask + TrailingStop * Point * 10;
if(newSL < OrderStopLoss() - Point * 10 || OrderStopLoss() == 0)
OrderModify(OrderTicket(), OrderOpenPrice(), newSL, OrderTakeProfit(), 0, clrNONE);
}
}
}
}
}

//+------------------------------------------------------------------+
//| 错误码描述 |
//+------------------------------------------------------------------+
string ErrorDescription(int errorCode)
{
switch(errorCode)
{
case 134: return("资金不足");
case 130: return("止损设置错误");
case 4108: return("交易被禁用");
default: return("未知错误");
}
}
//+------------------------------------------------------------------+
```

Parameter Explanation



| Parameter | Description |
|-----------|-------------|
| LotSize | Fixed lot size when UseMM=false |
| RiskPercent | Percentage of balance to risk per trade |
| RSIPeriod | RSI calculation period (default 14) |
| Overbought/Oversold | Divergence confirmation levels |
| MinDivergenceStrength | Minimum pip difference for divergence |
| StopLoss | Stop loss in pips |
| TakeProfit | Take profit in pips |
| TrailingStop | Trailing stop distance (0=disabled) |
| UseMM | Enable automatic money management |

Installation & Usage



1. Copy full code to MetaEditor (F4)
2. Compile with F7 – verify successful compilation
3. Attach EA to any currency pair chart (recommended: EURUSD, GBPUSD, USDJPY)
4. Configure parameters in Inputs tab
5. Enable AutoTrading and monitor trades

Compilation Tips



  • For 5-digit brokers, EA automatically handles pip calculation using `Point * 10`

  • Test on M15 or H1 timeframes for best divergence signals

  • Enable UseMM for proper risk management

  • Check Experts tab for any compilation errors


    • Reference



    This EA source code is independently developed and compiled. RSI divergence detection logic is based on classical technical analysis principles applied to algorithmic trading.

    *Looking for more verified EAs with live trading results? Subscribe to access our complete EA library with performance reports and optimization guides.*