黄金三均线交叉信号指标

#property copyright   "XAUOF 指标工坊"
#property version     "1.0"
#property strict
#property indicator_chart_window
#property indicator_buffers 5
#property indicator_plots   5

// 均线1（短期）
#property indicator_type1   DRAW_LINE
#property indicator_color1  clrDodgerBlue
#property indicator_width1  2
#property indicator_label1  "快线EMA"

// 均线2（中期）
#property indicator_type2   DRAW_LINE
#property indicator_color2  clrRed
#property indicator_width2  2
#property indicator_label2  "中线EMA"

// 均线3（长期）
#property indicator_type3   DRAW_LINE
#property indicator_color3  clrGold
#property indicator_width3  2
#property indicator_label3  "慢线EMA"

// 买入箭头
#property indicator_type4   DRAW_ARROW
#property indicator_color4  clrLime
#property indicator_width4  3
#property indicator_label4  "买入信号"

// 卖出箭头
#property indicator_type5   DRAW_ARROW
#property indicator_color5  clrRed
#property indicator_width5  3
#property indicator_label5  "卖出信号"

//--- 输入参数
input int    FastMA_Period   = 20;      // 快线周期（蓝色）：推荐 20
input int    MidMA_Period    = 50;      // 中线周期（红色）：推荐 50
input int    SlowMA_Period   = 200;     // 慢线周期（黄色）：推荐 200
input ENUM_MA_METHOD MA_Method = MODE_EMA;  // 均线类型：EMA 更灵敏
input ENUM_APPLIED_PRICE AppliedPrice = PRICE_CLOSE;  // 应用价格：收盘价
input bool   ShowArrows      = true;    // 是否显示箭头：true=显示买卖信号
input int    ArrowDistance   = 30;      // 箭头距离K线的点数：调整箭头位置

//--- 指标缓冲区
double FastMABuffer[];   // 快线缓冲区
double MidMABuffer[];    // 中线缓冲区
double SlowMABuffer[];   // 慢线缓冲区
double BuyArrowBuffer[]; // 买入箭头缓冲区
double SellArrowBuffer[];// 卖出箭头缓冲区

//--- 指标句柄
int fastHandle;
int midHandle;
int slowHandle;

//+------------------------------------------------------------------+
//| 自定义指标初始化函数                                                |
//+------------------------------------------------------------------+
int OnInit()
{
   //--- 绑定缓冲区到绘图
   SetIndexBuffer(0, FastMABuffer, INDICATOR_DATA);
   SetIndexBuffer(1, MidMABuffer, INDICATOR_DATA);
   SetIndexBuffer(2, SlowMABuffer, INDICATOR_DATA);
   SetIndexBuffer(3, BuyArrowBuffer, INDICATOR_DATA);
   SetIndexBuffer(4, SellArrowBuffer, INDICATOR_DATA);
   
   //--- 设置箭头代码
   PlotIndexSetInteger(3, PLOT_ARROW, 233);  // 买入向上箭头
   PlotIndexSetInteger(4, PLOT_ARROW, 234);  // 卖出向下箭头
   
   //--- 设置数组为时间序列（0 为最新）
   ArraySetAsSeries(FastMABuffer, true);
   ArraySetAsSeries(MidMABuffer, true);
   ArraySetAsSeries(SlowMABuffer, true);
   ArraySetAsSeries(BuyArrowBuffer, true);
   ArraySetAsSeries(SellArrowBuffer, true);
   
   //--- 创建均线指标句柄
   fastHandle = iMA(_Symbol, PERIOD_CURRENT, FastMA_Period, 0, MA_Method, AppliedPrice);
   midHandle = iMA(_Symbol, PERIOD_CURRENT, MidMA_Period, 0, MA_Method, AppliedPrice);
   slowHandle = iMA(_Symbol, PERIOD_CURRENT, SlowMA_Period, 0, MA_Method, AppliedPrice);
   
   //--- 检查句柄是否有效
   if(fastHandle == INVALID_HANDLE || midHandle == INVALID_HANDLE || slowHandle == INVALID_HANDLE)
   {
      Print("均线指标句柄创建失败！");
      return(INIT_FAILED);
   }
   
   //--- 指标名称
   IndicatorSetString(INDICATOR_SHORTNAME, "三均线交叉系统");
   
   return(INIT_SUCCEEDED);
}

//+------------------------------------------------------------------+
//| 自定义指标迭代函数                                                  |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
{
   //--- 检查K线数量是否足够
   if(rates_total < SlowMA_Period)
      return(0);
   
   //--- 设置价格数组为时间序列
   ArraySetAsSeries(close, true);
   ArraySetAsSeries(low, true);
   ArraySetAsSeries(high, true);
   
   //--- 从指标句柄拷贝均线数值
   if(CopyBuffer(fastHandle, 0, 0, rates_total, FastMABuffer) <= 0)
   {
      Print("快线数据拷贝失败！");
      return(0);
   }
   if(CopyBuffer(midHandle, 0, 0, rates_total, MidMABuffer) <= 0)
   {
      Print("中线数据拷贝失败！");
      return(0);
   }
   if(CopyBuffer(slowHandle, 0, 0, rates_total, SlowMABuffer) <= 0)
   {
      Print("慢线数据拷贝失败！");
      return(0);
   }
   
   //--- 计算起始位置
   int start = prev_calculated > 0 ? prev_calculated - 1 : SlowMA_Period;
   
   //--- 主循环：生成买卖信号
   for(int i = start; i < rates_total - 1 && i >= 1; i++)
   {
      //--- 初始化箭头缓冲区为空值
      BuyArrowBuffer[i] = EMPTY_VALUE;
      SellArrowBuffer[i] = EMPTY_VALUE;
      
      //--- 跳过没有足够历史数据的K线
      if(i >= rates_total - 1)
         continue;
      
      //--- 只在显示箭头开关打开时计算信号
      if(!ShowArrows)
         continue;
      
      //--- 买入信号：快线上穿中线 且 价格在慢线上方
      // 当前K线：快线 > 中线，上一根K线：快线 <= 中线（发生金叉）
      if(FastMABuffer[i] > MidMABuffer[i] && 
         FastMABuffer[i+1] <= MidMABuffer[i+1] &&
         close[i] > SlowMABuffer[i])
      {
         // 在K线低点下方绘制向上箭头
         BuyArrowBuffer[i] = low[i] - ArrowDistance * _Point;
      }
      
      //--- 卖出信号：快线下穿中线 且 价格在慢线下方
      // 当前K线：快线 < 中线，上一根K线：快线 >= 中线（发生死叉）
      if(FastMABuffer[i] < MidMABuffer[i] && 
         FastMABuffer[i+1] >= MidMABuffer[i+1] &&
         close[i] < SlowMABuffer[i])
      {
         // 在K线高点上方绘制向下箭头
         SellArrowBuffer[i] = high[i] + ArrowDistance * _Point;
      }
   }
   
   //--- 返回当前计算的K线数量
   return(rates_total);
}

//+------------------------------------------------------------------+
//| 指标卸载函数                                                      |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
{
   //--- 释放指标句柄
   if(fastHandle != INVALID_HANDLE)
      IndicatorRelease(fastHandle);
   if(midHandle != INVALID_HANDLE)
      IndicatorRelease(midHandle);
   if(slowHandle != INVALID_HANDLE)
      IndicatorRelease(slowHandle);
}