黄金变色通道非多即空EA

#property copyright "XAUOF 指标工坊"
#property version   "1.00"
#property strict

#include <Trade\Trade.mqh>

//-------------------- 可调参数 --------------------
input string         InpIndicatorName = "XAUUSD_ColorChannel_Trend"; // 配套指标文件名(不含.mq5)，须已编译放在Indicators目录
input int            InpFastPeriod = 14;    // 通道中轨(快均线)周期，须与指标一致，推荐14
input ENUM_MA_METHOD InpFastMethod = MODE_EMA;  // 快均线算法，须与指标一致
input int            InpSlowPeriod = 60;    // 慢均线周期，须与指标一致，推荐60
input ENUM_MA_METHOD InpSlowMethod = MODE_SMA;  // 慢均线算法，须与指标一致
input int            InpAtrPeriod  = 14;    // ATR周期，须与指标一致，推荐14
input double         InpAtrMult    = 1.2;   // ATR倍数(通道半宽)，须与指标一致，推荐1.2
input int            InpArrowGap   = 30;    // 箭头偏移(点)，仅用于与指标参数对齐，不影响交易
input double         InpLots       = 0.01;  // 固定下单手数，本EA要求0.01手
input ulong          InpMagic      = 20261007; // 魔术号，用于识别本EA的持仓
input bool           InpAlwaysHold = true;  // 非多即空开关：true=空仓时按通道颜色自动进场，保持始终持仓

CTrade trade;          // 交易对象
int    hInd = INVALID_HANDLE;  // 配套指标的句柄
datetime lastBarTime = 0;      // 上一根已处理K线的时间，用于"只在收盘时行动"

int OnInit()
{
   // 加载配套指标（参数顺序必须与指标input声明顺序一致）
   hInd = iCustom(_Symbol, PERIOD_CURRENT, InpIndicatorName,
                  InpFastPeriod, InpFastMethod, InpSlowPeriod, InpSlowMethod,
                  InpAtrPeriod, InpAtrMult, InpArrowGap);
   if(hInd == INVALID_HANDLE)
   {
      Print("加载指标失败，请确认指标已编译：", InpIndicatorName);
      return INIT_FAILED;
   }
   trade.SetExpertMagicNumber(InpMagic);
   trade.SetDeviationInPoints(30);
   trade.SetTypeFillingBySymbol(_Symbol);
   lastBarTime = 0;
   return INIT_SUCCEEDED;
}

void OnDeinit(const int reason)
{
   if(hInd != INVALID_HANDLE) IndicatorRelease(hInd);
}

// 查询本EA当前持仓方向：1=多，-1=空，0=空仓
int GetCurrentDirection()
{
   int dir = 0;
   for(int i = PositionsTotal() - 1; i >= 0; i--)
   {
      ulong ticket = PositionGetTicket(i);
      if(ticket == 0) continue;
      if(PositionGetString(POSITION_SYMBOL) != _Symbol) continue;
      if(PositionGetInteger(POSITION_MAGIC) != (long)InpMagic) continue;
      long t = PositionGetInteger(POSITION_TYPE);
      if(t == POSITION_TYPE_BUY)  dir = 1;
      if(t == POSITION_TYPE_SELL) dir = -1;
   }
   return dir;
}

// 平掉本EA全部持仓，返回是否全部成功
bool CloseAllPositions()
{
   bool ok = true;
   for(int i = PositionsTotal() - 1; i >= 0; i--)
   {
      ulong ticket = PositionGetTicket(i);
      if(ticket == 0) continue;
      if(PositionGetString(POSITION_SYMBOL) != _Symbol) continue;
      if(PositionGetInteger(POSITION_MAGIC) != (long)InpMagic) continue;
      if(!trade.PositionClose(ticket)) ok = false;
   }
   return ok;
}

// 市价开仓，dir=1买 / dir=-1卖；不设止损止盈（sl/tp传0）
bool OpenPosition(int dir)
{
   double lots = InpLots;
   double minL = SymbolInfoDouble(_Symbol, SYMBOL_VOLUME_MIN);
   double maxL = SymbolInfoDouble(_Symbol, SYMBOL_VOLUME_MAX);
   if(minL > 0.0 && lots < minL) lots = minL;   // 手数下限保护
   if(maxL > 0.0 && lots > maxL) lots = maxL;   // 手数上限保护
   if(dir > 0)  return trade.Buy(lots, _Symbol, 0.0, 0.0, 0.0, "ColorChannel Buy");
   if(dir < 0)  return trade.Sell(lots, _Symbol, 0.0, 0.0, 0.0, "ColorChannel Sell");
   return false;
}

void OnTick()
{
   if(!TerminalInfoInteger(TERMINAL_TRADE_ALLOWED)) return;  // 终端不允许交易
   if(!MQLInfoInteger(MQL_TRADE_ALLOWED)) return;            // EA不允许交易

   // 只在新K线出现(即上一根收盘)时判断一次，避免盘中反复反手
   datetime bt = iTime(_Symbol, PERIOD_CURRENT, 0);
   if(bt == lastBarTime) return;
   lastBarTime = bt;

   int bars = iBars(_Symbol, PERIOD_CURRENT);
   if(bars < 5) return;
   if(BarsCalculated(hInd) < bars) return;   // 指标还没算完，等下一tick

   // 复制最近两根已收盘K线的信号：非series数组中 [1]=刚收盘那根，[0]=再前一根
   double buyArr[2], sellArr[2], clrArr[2];
   if(CopyBuffer(hInd, 5, 1, 2, buyArr)  < 2) return;  // 缓冲5=买箭头
   if(CopyBuffer(hInd, 6, 1, 2, sellArr) < 2) return;  // 缓冲6=卖箭头
   if(CopyBuffer(hInd, 2, 1, 2, clrArr)  < 2) return;  // 缓冲2=通道颜色 0=红(多) 1=绿(空)

   bool buySig  = (buyArr[1]  != EMPTY_VALUE);
   bool sellSig = (sellArr[1] != EMPTY_VALUE);

   // 目标方向：有箭头跟箭头；无箭头且允许"非多即空"时跟通道当前颜色
   int desired = 0;
   if(buySig && !sellSig)       desired = 1;
   else if(sellSig && !buySig)  desired = -1;
   else if(InpAlwaysHold)       desired = (clrArr[1] <= 0.5) ? 1 : -1;
   if(desired == 0) return;

   int cur = GetCurrentDirection();
   if(desired == cur) return;          // 方向已正确，不动

   if(cur != 0)                        // 方向相反：先平仓再反手
   {
      if(!CloseAllPositions())
      {
         Print("平仓失败，本根K线放弃反手");
         return;
      }
   }
   if(OpenPosition(desired))
      Print("反手成功：", (desired > 0 ? "做多" : "做空"), " ", DoubleToString(InpLots, 2), " 手");
   else
      Print("开仓失败，错误码：", GetLastError());
}