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orded
14
orded 2008.02.24 12:06 
我试着把MT4平台自带的Moving Average.mq4改编成EA,但发现不能运行。
改编如下:
int start()
{ Print("Bars is ",Bars);
if(Bars<=MA_Period) return(0);
ExtCountedBars=IndicatorCounted(); Print("ExtCountedBars",ExtCountedBars);
if (ExtCountedBars<0) return(-1);
if (ExtCountedBars>0) ExtCountedBars--;
sma();
return(0);
}
改编后的EA测试得到下面这个日志:
10:40:39 112: loaded successfully
10:40:39 112 inputs: MA_Period=13; MA_Shift=0; MA_Method=0;
10:40:39 2008.01.15 00:00 112 GBPUSD,M5: Bars is 1001
10:40:39 2008.01.15 00:00 112 GBPUSD,M5: ExtCountedBars-1

我想请教一下IndicatorCounted()函数按说明是返回缓存数的。这个缓存里的是什么数据,为什么在 指标 里这个函数大于0,在EA里却变成-1了呢?
谢谢了。
Rashid Umarov
管理员
6600
Rashid Umarov 2008.02.25 10:25  
Attach this sample indicator CheckIndicatorCounted.mq4 to any chart and investigate the log (Print() fuction)
//+------------------------------------------------------------------+
//|                                        CheckIndicatorCounted.mq4 |
//|                      Copyright © 2007, MetaQuotes Software Corp. |
//|                                        http://www.metaquotes.net/ru/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2007, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net/ru/"
 
#property indicator_chart_window
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//----
   
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   int    counted_bars=IndicatorCounted();
//----
   Print(TimeToStr(TimeCurrent()),"    Bars=",Bars,"  Indicatorcounted=",counted_bars);
//----
   return(0);
  }
//+------------------------------------------------------------------+
orded
14
orded 2008.02.25 12:50  

非常感谢您的指导。

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