prev_calculated

Alexey Viktorov 2016.10.19 07:19 #81

Alexey Kozitsyn:
是的，这个循环可能太多。但如果在prev_calculated = 0时（当缓冲区先前已满），该缓冲区中的一些值被重置，也许这是一个错误。让我们现在检查一下...

不是说它们被重置，而是整个指标，整个历史的深度被重新计算。因此，如果我只需要填充缓冲区的最右边的索引，但当我把它移到左边时，这些值必须保留，那么我有两个选择。

1.在初始化指标缓冲区时，它充满了垃圾，需要进行清理。

2.我已经清理过了，但是当prev_calculated = 0时，缓冲区又被清理了，并且删除了所有的累积值。

一般来说，解决方案非常简单。 prev_calculated = 0加上一个标志就可以解决这个问题。

Dmitry Fedoseev 2016.10.19 07:23 #82

Alexey Viktorov:

...

一般来说，解决方案非常简单。 prev_calculated = 0加上一个标志就可以解决这个问题。

它没有。将会有一个持续时间为几个小时的连接中断，几个小时后将会出现未被初始化的垃圾。

[删除] 2016.10.19 07:24 #83

Alexey Viktorov:

不要假装...这一切都很清楚，但有一张图片是专门为你准备的。

计算机在没有关闭的情况下工作，图表没有关闭，指标没有重置......。

问题：2分钟的小节消失到哪里去了？

你的代码中可能有一个错误。我现在写了一个测试指标，当我通过刷新按钮重置时，缓冲区的大小没有变化，缓冲区中的数据也没有变化......。

#property indicator_buffers 1
#property indicator_plots 1
#property indicator_chart_window
#property indicator_type1 DRAW_NONE
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
double buf[];
const double _price=98000;
bool _firstLaunch=true;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
   SetIndexBuffer(0,buf);
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| 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[])
  {
   if(prev_calculated==0)
     {
      if(_firstLaunch)
        {
         Print(__FUNCTION__,": Первый запуск! Размер буфера = ",ArraySize(buf));
         ArrayInitialize(buf,_price);
         _firstLaunch=false;
        }
      else
        {
         Print(__FUNCTION__,": prev_calculated после обновления = ",prev_calculated,". Размер буфера = ",ArraySize(buf));
         //--- Проверяем отличие значений от эталонного
         for(int i=rates_total-1; i>=0; i--)
            if(buf[i]!=_price)
               Print(__FUNCTION__,": Значение #",i," '"+DoubleToString(buf[i],_Digits)+
                     "' отличается от эталонного '"+DoubleToString(_price,_Digits));
        }
     }
   else
     {
      if(rates_total>prev_calculated)
         buf[rates_total-1]=_price;
     }
   return(rates_total);
  }

prev_calculated 新人对MQL4和MQL5的任何问题，对算法和代码的帮助和讨论萌新求助，最简单的5日移动均线如何编写？mql4

Dmitry Fedoseev 2016.10.19 07:25 #84

从prev_calculated到rate_total，必须对缓冲区进行清理。

[删除] 2016.10.19 07:26 #85

要么，就像迪米特里上面说的那样，在交流中出现了几个小节的中断......。顺便问一下，当连接中断时，prev_calculated是否也会返回0？

Alexey Viktorov 2016.10.19 07:28 #86

Dmitry Fedoseev:
给我看看代码。让我们笑着解释。

我已经在笑了。

/********************************************************************\
|                                               BalansEquityTest.mq5 |
|                                                           Viktorov |
|                                                  v4forex@yandex.ru |
\********************************************************************/
#property copyright "Viktorov"
#property link      "v4forex@yandex.ru"
#property version   "1.00"
#property indicator_separate_window
#property indicator_buffers   6
#property indicator_plots     3
#property indicator_type1     DRAW_COLOR_LINE
#property indicator_color1    clrGold, clrGreen, clrRed
#property indicator_width1    2
#property indicator_label1    "Balance"
#property indicator_type2     DRAW_HISTOGRAM2
#property indicator_color2    clrCrimson
#property indicator_width2    2
#property indicator_label2    "EquityMin"
#property indicator_type3     DRAW_HISTOGRAM2
#property indicator_color3    clrDarkViolet
#property indicator_width3    2
#property indicator_label3    "EquityMax"

double balance[];
double clrBalance[];
double equityMaxB[];
double equityMinB[];
double equityMax[];
double equityMin[];
double maxEquity, minEquity;

bool flag = true;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   SetIndexBuffer(0, balance, INDICATOR_DATA);
   SetIndexBuffer(1, clrBalance, INDICATOR_COLOR_INDEX);
   SetIndexBuffer(2, equityMin, INDICATOR_DATA);
   SetIndexBuffer(3, equityMinB, INDICATOR_DATA);
   SetIndexBuffer(4, equityMax, INDICATOR_DATA);
   SetIndexBuffer(5, equityMaxB, INDICATOR_DATA);
   PlotIndexSetDouble(0, PLOT_EMPTY_VALUE, 0.0);
   PlotIndexSetDouble(1, PLOT_EMPTY_VALUE, 0.0);
   PlotIndexSetDouble(2, PLOT_EMPTY_VALUE, 0.0);
   PlotIndexSetDouble(3, PLOT_EMPTY_VALUE, 0.0);
   PlotIndexSetDouble(4, PLOT_EMPTY_VALUE, 0.0);
   ArraySetAsSeries(balance, true);
   ArraySetAsSeries(clrBalance, true);
   ArraySetAsSeries(equityMax, true);
   ArraySetAsSeries(equityMaxB, true);
   ArraySetAsSeries(equityMin, true);
   ArraySetAsSeries(equityMinB, true);
   IndicatorSetInteger(INDICATOR_DIGITS, 2);
   IndicatorSetString(INDICATOR_SHORTNAME, "Show Money");
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| 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[])
  {
//---
if(prev_calculated == 0)
  {
   Print("prev_calculated = ", prev_calculated);
   if(flag)
    {
     ArrayInitialize(balance, 0.0);
      ArrayInitialize(equityMax, 0.0);
       ArrayInitialize(equityMaxB, 0.0);
      ArrayInitialize(equityMin, 0.0);
     ArrayInitialize(equityMinB, 0.0);
      flag = false;
    }
   return(rates_total);
  }
  double bal = NormalizeDouble(AccountInfoDouble(ACCOUNT_BALANCE), 2);
  double equity = NormalizeDouble(AccountInfoDouble(ACCOUNT_EQUITY), 2);
  if(rates_total > prev_calculated)
   {
    minEquity = 0;
    maxEquity = 0;
   }
   minEquity = NormalizeDouble(fmin((minEquity == 0 ? bal : minEquity), equity), 2);
    maxEquity = NormalizeDouble(fmax(maxEquity, equity), 2);
    balance[0] = bal;
    clrBalance[0] = 0.0;
    equityMinB[0] = balance[0];
    equityMin[0] = minEquity;
    equityMaxB[0] = balance[0];
    equityMax[0] = maxEquity;
    if(balance[0] > balance[1])
     clrBalance[0] = 1.0;
    if(balance[0] < balance[1])
     clrBalance[0] = 2.0;
    Comment(PositionsTotal());
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+

一夜之间，有这么多的prev_calculate的归零。

2016.10.19 08:42:23.309 BalansEquityTest (EURUSD,M1)    prev_calculated = 0
2016.10.19 05:47:04.915 BalansEquityTest (EURUSD,M1)    prev_calculated = 0
2016.10.19 05:47:04.075 BalansEquityTest (EURUSD,M1)    prev_calculated = 0
2016.10.19 04:46:15.300 BalansEquityTest (EURUSD,M1)    prev_calculated = 0
2016.10.19 04:46:15.030 BalansEquityTest (EURUSD,M1)    prev_calculated = 0
2016.10.19 04:45:37.590 BalansEquityTest (EURUSD,M1)    prev_calculated = 0
2016.10.19 04:45:37.100 BalansEquityTest (EURUSD,M1)    prev_calculated = 0
2016.10.19 01:40:31.224 BalansEquityTest (EURUSD,M1)    prev_calculated = 0
2016.10.19 00:00:32.196 BalansEquityTest (EURUSD,M1)    prev_calculated = 0
2016.10.19 00:00:31.806 BalansEquityTest (EURUSD,M1)    prev_calculated = 0
2016.10.18 20:33:02.954 BalansEquityTest (EURUSD,M1)    prev_calculated = 0 // Это время последнего запуска индикатора.

prev_calculated 初学者的问题 MQL5 MT5 MetaTrader MQL5的股权振荡器意味着

[删除] 2016.10.19 07:28 #87

Dmitry Fedoseev:

从prev_calculated到rate_total，必须对缓冲区进行清理。

如果这是我的答案，那么在指标的第一次启动时，缓冲区被完全初始化为给定值。当一个新的条形图形成时，新的数值会被覆盖。

Dmitry Fedoseev 2016.10.19 07:31 #88

Alexey Kozitsyn:
或者，正如Dmitriy在上面所说的，有几个酒吧出现了连接故障......。顺便问一下，当连接中断时，prev_calculated是否也会返回0？

以前所有的问题prev_calculated都会返回0。然后在论坛上有一个讨论，说有可能不总是重置为0，但在某些情况下你可以重置为最后计算的值，在这个主题中，Slava参与并承诺会研究这个问题。

一段时间后，我注意到prev_calculated有时会出现中间值。现在我不知道了，我没有每天看prev_calculated的回报。

Dmitry Fedoseev 2016.10.19 07:32 #89

Alexey Kozitsyn:
如果这是我的答案，第一次启动指标时，缓冲区被完全初始化为设定值。当一个新的条形图形成时--新的值被覆盖。

不是你。

[删除] 2016.10.19 07:44 #90

Alexey Viktorov:

我已经在笑了。

/********************************************************************\
|                                               BalansEquityTest.mq5 |
|                                                           Viktorov |
|                                                  v4forex@yandex.ru |
\********************************************************************/
#property copyright "Viktorov"
#property link      "v4forex@yandex.ru"
#property version   "1.00"
#property indicator_separate_window
#property indicator_buffers   6
#property indicator_plots     3
#property indicator_type1     DRAW_COLOR_LINE
#property indicator_color1    clrGold, clrGreen, clrRed
#property indicator_width1    2
#property indicator_label1    "Balance"
#property indicator_type2     DRAW_HISTOGRAM2
#property indicator_color2    clrCrimson
#property indicator_width2    2
#property indicator_label2    "EquityMin"
#property indicator_type3     DRAW_HISTOGRAM2
#property indicator_color3    clrDarkViolet
#property indicator_width3    2
#property indicator_label3    "EquityMax"

double balance[];
double clrBalance[];
double equityMaxB[];
double equityMinB[];
double equityMax[];
double equityMin[];
double maxEquity, minEquity;

bool flag = true;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   SetIndexBuffer(0, balance, INDICATOR_DATA);
   SetIndexBuffer(1, clrBalance, INDICATOR_COLOR_INDEX);
   SetIndexBuffer(2, equityMin, INDICATOR_DATA);
   SetIndexBuffer(3, equityMinB, INDICATOR_DATA);
   SetIndexBuffer(4, equityMax, INDICATOR_DATA);
   SetIndexBuffer(5, equityMaxB, INDICATOR_DATA);
   PlotIndexSetDouble(0, PLOT_EMPTY_VALUE, 0.0);
   PlotIndexSetDouble(1, PLOT_EMPTY_VALUE, 0.0);
   PlotIndexSetDouble(2, PLOT_EMPTY_VALUE, 0.0);
   PlotIndexSetDouble(3, PLOT_EMPTY_VALUE, 0.0);
   PlotIndexSetDouble(4, PLOT_EMPTY_VALUE, 0.0);
   ArraySetAsSeries(balance, true);
   ArraySetAsSeries(clrBalance, true);
   ArraySetAsSeries(equityMax, true);
   ArraySetAsSeries(equityMaxB, true);
   ArraySetAsSeries(equityMin, true);
   ArraySetAsSeries(equityMinB, true);
   IndicatorSetInteger(INDICATOR_DIGITS, 2);
   IndicatorSetString(INDICATOR_SHORTNAME, "Show Money");
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| 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[])
  {
//---
if(prev_calculated == 0)
  {
   Print("prev_calculated = ", prev_calculated);
   if(flag)
    {
     ArrayInitialize(balance, 0.0);
      ArrayInitialize(equityMax, 0.0);
       ArrayInitialize(equityMaxB, 0.0);
      ArrayInitialize(equityMin, 0.0);
     ArrayInitialize(equityMinB, 0.0);
      flag = false;
    }
   return(rates_total);
  }
  double bal = NormalizeDouble(AccountInfoDouble(ACCOUNT_BALANCE), 2);
  double equity = NormalizeDouble(AccountInfoDouble(ACCOUNT_EQUITY), 2);
  if(rates_total > prev_calculated)
   {
    minEquity = 0;
    maxEquity = 0;
   }
   minEquity = NormalizeDouble(fmin((minEquity == 0 ? bal : minEquity), equity), 2);
    maxEquity = NormalizeDouble(fmax(maxEquity, equity), 2);
    balance[0] = bal;
    clrBalance[0] = 0.0;
    equityMinB[0] = balance[0];
    equityMin[0] = minEquity;
    equityMaxB[0] = balance[0];
    equityMax[0] = maxEquity;
    if(balance[0] > balance[1])
     clrBalance[0] = 1.0;
    if(balance[0] < balance[1])
     clrBalance[0] = 2.0;
    Comment(PositionsTotal());
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+

有可能，错误可能在这里。

if(rates_total > prev_calculated)
   {
    minEquity = 0;
    maxEquity = 0;
   }
   minEquity = NormalizeDouble(fmin((minEquity == 0 ? bal : minEquity), equity), 2);
    maxEquity = NormalizeDouble(fmax(maxEquity, equity), 2);

当一个新的条形图到来时，你把数值重置为0--很好。但这样一来，你就会检查minEquity和0是否相等，这种方式不值得推荐。

为了证实我的话--你的照片。你可以看到，如你所说，"垃圾 "值在零左右。

当然，更好的做法是将带有 "垃圾 "值的数据窗口添加到图中。

prev_calculated - 页 9