MT4主表左上角做了个 价格标签， 如何让价格颜色随着价格变动（上涨Label颜色为红，下跌时Label颜色为绿) 请重点看本人对color1的定义 ，为什么定义过后指标并没有改变颜色？已附截图！！

[Xiao Dong Lin]

#property copyright "LXD"
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict
#property indicator_separate_window
#property indicator_buffers 3
#property indicator_plots   1
//--- plot Label1
#property indicator_label1  "Label1"

#property indicator_color1  clrBlack
#property indicator_style1  STYLE_SOLID
#property indicator_type1   DRAW_NONE
#property indicator_width1  1
//--- plot Label2
#property indicator_label2  "Label2"

#property indicator_color2  clrRed
#property indicator_style1  STYLE_SOLID
#property indicator_type2   DRAW_NONE
#property indicator_width2  1
//--- plot Label3
#property indicator_label3  "Label3"
#property indicator_type3   DRAW_LINE
#property indicator_color3  clrForestGreen
#property indicator_style3  STYLE_SOLID
#property indicator_width3  1
//--- indicator buffers
double         Label1Buffer[];
double         Label2Buffer[];
double         Label3Buffer[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   SetIndexBuffer(0,Label1Buffer);
   SetIndexBuffer(1,Label2Buffer);
   SetIndexBuffer(2,Label3Buffer);
   
//---
   return(INIT_SUCCEEDED);
  }
  
  int start()
  {
  string color1;
  for(int i=0;i<Bars;i++)
  {
  Label1Buffer[i]=iClose("UKOUSD",0,i);
  Label2Buffer[i]=iClose("USOUSD",0,i);
  Label3Buffer[i]=(Label1Buffer[i]-Label2Buffer[i]) ;
  
  if((Label3Buffer[0]-Label3Buffer[1])>=0)
  color1=(string)Red;
  else
  color1=(string)Green;
  }
   
  ObjectCreate("油价差",OBJ_LABEL,0,0,0,0);
  ObjectSetText("油价差","油价差:"+(string)Label3Buffer[0],23,"Tahoma",color1);
  ObjectSet("油价差",OBJPROP_XDISTANCE,20);
  ObjectSet("油价差",OBJPROP_YDISTANCE,20);
  
  
  return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
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[])
  
//---
  {
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+

[Sergey Golubev]

Forum on trading, automated trading systems and testing trading strategies

When you post code please use the CODE button (Alt-S)!

Thank you.

[Sergey Golubev]

Forum on trading, automated trading systems and testing trading strategies

don't attach an image, insert the image) 

Thank you.

[Xiangdong Guo]

color color1;
.
.
color1 = clrRed;
..
color1 = clrGreen;

[Xiao Dong Lin]

Xiangdong Guo:

已经按你的建议调整了，但是最终显示结果显示并没有按照预期的那样，根据行情的变化而改变颜色

[Xiangdong Guo]

SWEETBOY1990:

已经按你的建议调整了，但是最终显示结果显示并没有按照预期的那样，根据行情的变化而改变颜色

我记得回复过你的另一个帖子：不要用脚本模板编写指标。

你的对象创建放在了 start() 函数里，而这是脚本才会用的。

你把实体代码从 start() 里挪到 OnCalculate() 里面。