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如何利用 MQL5 检测趋势和图表形态·进阶篇

Q: 在黄金15分钟图上怎么用两个低点连趋势线判断后面是涨还是跌？

取最近两个明显抬低的低点连成线，价格回踩不破且放量站回线上方，倾向延续上行；跌破则趋势可能转弱，外汇贵金属波动大需轻仓验证。

Q: 双顶形态刚冒头时，怎么区分是真的反转还是假突破洗盘？

看第二个顶的成交量是否低于第一个顶，且右顶后跌破颈线才确认；只用双高点在震荡市里容易误判，建议结合趋势线斜率过滤。

Q: 小布能帮我自动盯着双底雏形吗，不用自己一直看图表？

可以，小布盯盘的AIGC会扫描品种页识别双底低点结构并推送提示，你把重复劳动交给小布，专注决策即可。

Q: EA抓到的双顶变种里，哪种在镑美上假信号更少一点？

距离更宽、右顶略低于左顶且伴随动能背离的变种假信号偏少；但外汇高风险，任何信号都先开模拟验证再上实盘。

Q: 把双顶信号直接标在图表上，一般用什么颜色或形状不容易看漏？

用红色箭头标右顶、虚线画颈线最直观；关键是在MT5里设好alert弹窗，比纯图形更不容易错过。

第 2/3 篇

本章目录

用双底点画趋势线并判方向
用双高低点判趋势状态
用 EA 抓双顶的两个变种
双顶识别与趋势线绘制的具体实现
把双顶信号打到图表上
用EA在MT5里抓双底雏形

用双底点画趋势线并判方向

这段逻辑先取两个低点价格并规范到 5 位小数，再删掉旧的趋势线对象，用 OBJ_TREND 连起前一低点和当前低点，向右延伸射线，颜色绿、线宽 3。注意 lowVal1 与 lowVal2 的比较是后续方向判断的硬依据，而非单纯看价格绝对值。当 lowVal1>lowVal2 且 highVal1>highVal2 时，判定为 Uptrend；反之为 Downtrend；其余情况归 Sideways。Comment 会把当前/前一根高低点都打印到图表左上，方便肉眼复核 EA 的判断是否和你的价格行为读图一致。 getmove 与 getNextMove 是两个辅助定位函数：getmove 从 startPos 起循环调用 getNextMove，直到返回的极值柱号等于当前柱，相当于在指定回看窗内锁定某一侧极值。getNextMove 对 startPos<0 做了保护，把负偏移折算进 count 再从 0 柱算起，避免边界报错。外汇与贵金属波动剧烈，这类自动画线仅作辅助，信号失效概率不低，实盘前务必在 MT5 策略测试器用历史数据验证。

MQL5 / C++

lowVal1=NormalizeDouble(iLow(_Symbol,_Period,low1),class="num">5);
lowVal2=NormalizeDouble(iLow(_Symbol,_Period,low2),class="num">5);
ObjectDelete(class="num">0,"bottomLine");
ObjectCreate(class="num">0,"bottomLine",OBJ_TREND,class="num">0,iTime(Symbol(),Period(),low2),iLow(Symbol(),Period(),low2),iTime(Symbol(),Period(),low1),iLow(Symbol(),Period(),low1));
ObjectSetInteger(class="num">0,"bottomLine",OBJPROP_COLOR,clrGreen);
ObjectSetInteger(class="num">0,"bottomLine",OBJPROP_WIDTH,class="num">3);
ObjectSetInteger(class="num">0,"bottomLine",OBJPROP_RAY_RIGHT,true);
if(lowVal1>lowVal2&&highVal1>highVal2)
  {
    Comment("Uptrend",
            "\nCurrent High ",highVal1,"\nPrevious High ",highVal2,
            "\nCurrent Low ",lowVal1,"\nPrevious Low ",lowVal2);
  }
 else
  if(highVal1<highVal2&&lowVal1<lowVal2)
    {
     Comment("Downtrend",
            "\nCurrent High ",highVal1,"\nPrevious High ",highVal2,
            "\nCurrent Low ",lowVal1,"\nPrevious Low ",lowVal2);
    }
   else
    {
     Comment("Sideways",
            "\nCurrent High ",highVal1,"\nPrevious High ",highVal2,
            "\nCurrent Low ",lowVal1,"\nPrevious Low ",lowVal2);
    }
}
class="type">int getmove(class="type">int move, class="type">int count, class="type">int startPos)
  {
  if(move!=MODE_HIGH && move!=MODE_LOW)
    class="kw">return (-class="num">1);
  class="type">int currentBar=startPos;
  class="type">int moveReturned=getNextMove(move,count*class="num">2+class="num">1,currentBar-count);
  while(moveReturned!=currentBar)
    {
     currentBar=getNextMove(move,count,currentBar+class="num">1);
     moveReturned=getNextMove(move,count*class="num">2+class="num">1,currentBar-count);
    }
  class="kw">return(currentBar);
  }
class="type">int getNextMove(class="type">int move, class="type">int count, class="type">int startPos)
  {
  if(startPos<class="num">0)
    {
     count +=startPos;
     startPos =class="num">0;
    }
  class="kw">return((move==MODE_HIGH)?
            iHighest(Symbol(),Period(),(ENUM_SERIESMODE)move,count,startPos):

◍ 用双高低点判趋势状态

在 MT5 脚本里，先把前后两段 K 线区间的高低点分别抓出来，再用 NormalizeDouble 统一到 5 位小数，避免浮点误差导致比较失真。上面这段逻辑定义了 high1/high2/low1/low2 四个索引位，以及对应的 highVal1/highVal2/lowVal1/lowVal2 数值。当前高与前高、当前低与前低同时抬高，就倾向判为 Uptrend；同时压低则倾向 Downtrend；其余情况归为 Sideways。实盘里外汇和贵金属波动受杠杆与消息面影响，高低点结构只反映概率性偏向，不代表后续必沿该方向运行，属于高风险品种下的参考信号。把 Comment 输出的内容接到小布面板上，能省掉手动比对两根 K 线的高低。

MQL5 / C++

  iLowest(Symbol(),Period(),(ENUM_SERIESMODE)move,count,startPos));
  }
  class="type">int high1, high2, low1, low2;
  class="type">class="kw">double highVal1, highVal2, lowVal1, lowVal2;
  highVal1=NormalizeDouble(iHigh(_Symbol,_Period,high1),class="num">5);
  highVal2=NormalizeDouble(iHigh(_Symbol,_Period,high2),class="num">5);
  lowVal1=NormalizeDouble(iLow(_Symbol,_Period,low1),class="num">5);
  lowVal2=NormalizeDouble(iLow(_Symbol,_Period,low2),class="num">5);
  if(lowVal1>lowVal2&&highVal1>highVal2)
    {
      Comment("Uptrend",
            "\nCurrent High ",highVal1,"\nPrevious High ",highVal2,
            "\nCurrent Low ",lowVal1,"\nPrevious Low ",lowVal2);
    }
  else
    if(highVal1<highVal2&&lowVal1<lowVal2)
      {
       Comment("Downtrend",
            "\nCurrent High ",highVal1,"\nPrevious High ",highVal2,
            "\nCurrent Low ",lowVal1,"\nPrevious Low ",lowVal2);
      }
      else
      {
       Comment("Sideways",
            "\nCurrent High ",highVal1,"\nPrevious High ",highVal2,
            "\nCurrent Low ",lowVal1,"\nPrevious Low ",lowVal2);
      }

「用 EA 抓双顶的两个变种」

双顶形态不一定非要两个高点完全相等。实战里更常见的是后一个高点略低于或等于前一个，而中间低点的情况决定它是「潜在」还是「确认」：低点抬高倾向暗示购买力还在挣扎，低点走低则下跌概率更大。下面这套 MQL5 逻辑只检查最近 5 根内的两个高/低结构（checkBars=5），用 getmove 回溯前高前低，再比对 highVal 与 lowVal 的关系。外汇和贵金属波动大，这种形态识别只作辅助，误判风险高。判定规则很直白：若 highVal1<=highVal2 且 lowVal1>lowVal2，图表注释打「潜在的双顶」；若 highVal1<=highVal2 且 lowVal1<lowVal2，打「双顶」。不匹配就不输出，避免噪音。编译挂上 MT5 后，你能在 EURUSD 的 M15 上翻到不少样例——比如等高点配更高低点出潜在信号，等高点配更低低点出确认信号。直接复制代码改 checkBars 到 8，回看更高周期过滤假突破。

MQL5 / C++

class=class="str">"cmt">//+------------------------------------------------------------------+
class=class="str">"cmt">//|                                                                 DT patternFinder.mq5 |
class=class="str">"cmt">//|                                         Copyright class="num">2023, MetaQuotes Ltd. |
class=class="str">"cmt">//|                                              [MQL5官方文档] |
class=class="str">"cmt">//+------------------------------------------------------------------+
class="macro">#class="kw">property copyright "Copyright class="num">2023, MetaQuotes Ltd."
class="macro">#class="kw">property link      "[MQL5官方文档]
class="macro">#class="kw">property version   "class="num">1.00"
class=class="str">"cmt">//+------------------------------------------------------------------+
class="type">void OnTick()
  {
   class="type">int checkBars= class="num">5;
   class="type">int high1, high2, low1, low2;
   class="type">class="kw">double highVal1, highVal2, lowVal1, lowVal2;
   high1=getmove(MODE_HIGH,checkBars,class="num">0);
   high2=getmove(MODE_HIGH,checkBars,high1+class="num">1);
   highVal1=NormalizeDouble(iHigh(_Symbol,_Period,high1),class="num">5);
   highVal2=NormalizeDouble(iHigh(_Symbol,_Period,high2),class="num">5);
   ObjectDelete(class="num">0,"topLine");
   ObjectCreate(class="num">0,"topLine",OBJ_TREND,class="num">0,iTime(Symbol(),Period(),high2),iHigh(Symbol(),Period(),high2),iTime(Symbol(),Period(),high1),iHigh(Symbol(),Period(),high1));
   ObjectSetInteger(class="num">0,"topLine",OBJPROP_COLOR,clrRed);
   ObjectSetInteger(class="num">0,"topLine",OBJPROP_WIDTH,class="num">3);
   ObjectSetInteger(class="num">0,"topLine",OBJPROP_RAY_RIGHT,true);
   low1=getmove(MODE_LOW,checkBars,class="num">0);
   low2=getmove(MODE_LOW,checkBars,low1+class="num">1);
   lowVal1=NormalizeDouble(iLow(_Symbol,_Period,low1),class="num">5);
   lowVal2=NormalizeDouble(iLow(_Symbol,_Period,low2),class="num">5);
   ObjectDelete(class="num">0,"bottomLine");

双顶识别与趋势线绘制的具体实现

这段逻辑在 MT5 上把双顶的判定和可视化拆成了两步：先画一条连接两个低点的绿色趋势线，再根据高低点关系用 Comment 输出形态提示。外汇与贵金属波动剧烈，双顶仅为概率性反转信号，须结合仓位控制。 ObjectCreate 用 OBJ_TREND 在图表上拉出名为 bottomLine 的线段，两端锚定在 low2 与 low1 对应的 K 线时间和国价低点；随后用 ObjectSetInteger 把颜色设为 clrGreen、线宽设为 3、并开启 OBJPROP_RAY_RIGHT 向右延伸，方便肉眼跟踪颈线支撑。判定部分靠 highVal1<=highVal2 配合 lowVal1 与 lowVal2 的大小写分支：若低点抬高则标 Potential Double Top，若低点也下移则直接标 Double Top，其余情况清空提示。getmove 与 getNextMove 是两个辅助函数，前者循环调用后者在指定窗口内定位第 N 个极值 Bar，后者通过 iHighest / iLowest 按 MODE_HIGH 或 MODE_LOW 取区间极值，startPos 为负时会自动把 count 补齐并从 0 重算。把这些函数直接塞进 EA 的 OnCalculate，把 low1、low2、highVal1、highVal2 换成你自己的极值变量，就能在 EURUSD 的 M15 上实时看到双顶标注。复盘时建议把 count 参数从默认 2 调到 3，过滤掉小周期噪音。

MQL5 / C++

ObjectCreate(class="num">0,"bottomLine",OBJ_TREND,class="num">0,iTime(Symbol(),Period(),low2),iLow(Symbol(),Period(),low2),iTime(Symbol(),Period(),low1),iLow(Symbol(),Period(),low1));
ObjectSetInteger(class="num">0,"bottomLine",OBJPROP_COLOR,clrGreen);
ObjectSetInteger(class="num">0,"bottomLine",OBJPROP_WIDTH,class="num">3);
ObjectSetInteger(class="num">0,"bottomLine",OBJPROP_RAY_RIGHT,true);
if(highVal1<=highVal2&&lowVal1>lowVal2)
  {
    Comment("Potential Double Top",
            "\nCurrent High ",highVal1,"\nPrevious High ",highVal2,
            "\nCurrent Low ",lowVal1,"\nPrevious Low ",lowVal2);
  }
else
  if(highVal1<=highVal2&&lowVal1<lowVal2)
    {
     Comment("Double Top",
              "\nCurrent High ",highVal1,"\nPrevious High ",highVal2,
              "\nCurrent Low ",lowVal1,"\nPrevious Low ",lowVal2);
    }
  else
     Comment(" ");
}
class="type">int getmove(class="type">int move, class="type">int count, class="type">int startPos)
 {
   if(move!=MODE_HIGH && move!=MODE_LOW)
     class="kw">return (-class="num">1);
   class="type">int currentBar=startPos;
   class="type">int moveReturned=getNextMove(move,count*class="num">2+class="num">1,currentBar-count);
   while(moveReturned!=currentBar)
     {
      currentBar=getNextMove(move,count,currentBar+class="num">1);
      moveReturned=getNextMove(move,count*class="num">2+class="num">1,currentBar-count);
     }
   class="kw">return(currentBar);
  }
class="type">int getNextMove(class="type">int move, class="type">int count, class="type">int startPos)
 {
   if(startPos<class="num">0)
     {
      count +=startPos;
      startPos =class="num">0;
     }
   class="kw">return((move==MODE_HIGH)?
          iHighest(Symbol(),Period(),(ENUM_SERIESMODE)move,count,startPos):
          iLowest(Symbol(),Period(),(ENUM_SERIESMODE)move,count,startPos));
  }
   if(highVal1<=highVal2&&lowVal1>lowVal2)
     {
       Comment("Potential Double Top",
               "\nCurrent High ",highVal1,"\nPrevious High ",highVal2,
               "\nCurrent Low ",lowVal1,"\nPrevious Low ",lowVal2);
     }
   else
     if(highVal1<=highVal2&&lowVal1<lowVal2)

◍ 把双顶信号打到图表上

识别到双顶结构后，如果只是内部变量存着，交易者肉眼很难快速确认。把关键极值直接打印在图表左上角，是低成本的自检办法。下面这段代码在条件满足时调用 Comment，把形态名称和四个价格一并输出：当前高点 highVal1、前高 highVal2、当前低点 lowVal1、前低 lowVal2；若不满足则清空注释，避免旧信息干扰。

MQL5 / C++

   {
      Comment("Double Top",
              "\nCurrent High ",highVal1,"\nPrevious High ",highVal2,
              "\nCurrent Low ",lowVal1,"\nPrevious Low ",lowVal2);
   }
   else
      Comment(" ");

逐行拆解：外层花括号是 if 分支的执行体；Comment 第一个参数是字符串 "Double Top" 作标题；随后用 \n 换行并依次拼入高低点变量；else 分支传空格字符串，等效于擦除上一帧的注释。在 MT5 里按 F4 编译后，当双顶逻辑命中，你能在报价窗口左上看到实时数值，用来比对两根 K 线的高点误差是否在允许阈值内。外汇与贵金属波动剧烈，这类形态失败概率不低，仅作辅助参考。

MQL5 / C++

   {
      Comment("Double Top",
              "\nCurrent High ",highVal1,"\nPrevious High ",highVal2,
              "\nCurrent Low ",lowVal1,"\nPrevious Low ",lowVal2);
   }
   else
      Comment(" ");

「用EA在MT5里抓双底雏形」

双底和双顶互为镜像：两段大致相等的低点暗示卖方动能衰减，价格后续向上突破两低点间颈线（前高）时才算形态确认。外汇与贵金属杠杆高，形态失效是常态，任何信号都只是概率倾向，不是方向保证。写个EA连续比对最近两段高低点即可。若当前低点≥前低点、且当前高点低于前高点，标为「潜在的双底」；若当前低点≥前低点、当前高点也高于前高点，则判为「双底」。这样略高/略低的实战变形也能兜住，不只认死板的绝对等高。下面这段MQL5在每跳刷新时取5根内两段极值，画红线连前高，并准备比低。编译零报错后挂上回测，图表注释会直接吐出当前/前高、当前/前低四值，你照着改阈值就能跑。代码逐行拆解： #property段声明版权与版本，无关逻辑可忽略。 void OnTick() 每笔报价触发。 int checkBars=5 限定回溯5根K线找极值。 high1/getmove找最近一段高点索引，high2找再前一段。 iHigh取对应高价，NormalizeDouble精度截到5位。 ObjectDelete+ObjectCreate画红色趋势线连两高，RAY_RIGHT向右延伸。 low1/low2同理取两段低点索引，iLow取低价并规范化。后续ObjectDelete("bottomLine")是为清旧低线，留待下一屏补画与条件注释。

MQL5 / C++

class=class="str">"cmt">//+------------------------------------------------------------------+
class=class="str">"cmt">//|                                                                  DB patternFinder.mq5 |
class=class="str">"cmt">//|                                         Copyright class="num">2023, MetaQuotes Ltd. |
class=class="str">"cmt">//|                                             [MQL5官方文档] |
class=class="str">"cmt">//+------------------------------------------------------------------+
class="macro">#class="kw">property copyright "Copyright class="num">2023, MetaQuotes Ltd."
class="macro">#class="kw">property link      "[MQL5官方文档]
class="macro">#class="kw">property version   "class="num">1.00"
class=class="str">"cmt">//+------------------------------------------------------------------+
class="type">void OnTick()
  {
   class="type">int checkBars= class="num">5;
   class="type">int high1, high2, low1, low2;
   class="type">class="kw">double highVal1, highVal2, lowVal1, lowVal2;
   high1=getmove(MODE_HIGH,checkBars,class="num">0);
   high2=getmove(MODE_HIGH,checkBars,high1+class="num">1);
   highVal1=NormalizeDouble(iHigh(_Symbol,_Period,high1),class="num">5);
   highVal2=NormalizeDouble(iHigh(_Symbol,_Period,high2),class="num">5);
   ObjectDelete(class="num">0,"topLine");
   ObjectCreate(class="num">0,"topLine",OBJ_TREND,class="num">0,iTime(Symbol(),Period(),high2),iHigh(Symbol(),Period(),high2),iTime(Symbol(),Period(),high1),iHigh(Symbol(),Period(),high1));
   ObjectSetInteger(class="num">0,"topLine",OBJPROP_COLOR,clrRed);
   ObjectSetInteger(class="num">0,"topLine",OBJPROP_WIDTH,class="num">3);
   ObjectSetInteger(class="num">0,"topLine",OBJPROP_RAY_RIGHT,true);
   low1=getmove(MODE_LOW,checkBars,class="num">0);
   low2=getmove(MODE_LOW,checkBars,low1+class="num">1);
   lowVal1=NormalizeDouble(iLow(_Symbol,_Period,low1),class="num">5);
   lowVal2=NormalizeDouble(iLow(_Symbol,_Period,low2),class="num">5);
   ObjectDelete(class="num">0,"bottomLine");