【发布时间】：2018-07-10 21:11:17
【问题描述】：
请帮助我了解如何从 MQL4 中的 iCustom() 函数读取 iExposure 指标的利润值？ 谢谢
【问题讨论】：
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你试过什么？什么不起作用？您说的指标是什么，它有哪些缓冲区以及您需要哪些缓冲区？
标签： mql4
【发布时间】：2018-07-10 21:11:17
【问题描述】：
我正在使用 mt4 提供的 iExposure.mq4 指标。它有以下缓冲区
SetIndexBuffer(0,ExtMapBuffer);
ExtMapBuffer[Bars-1]=-1;
我需要 iCustom 的利润部分`() 我附上了整个指标代码供您参考。 谢谢，
【讨论】：
//+------------------------------------------------------------------+
//| iExposureSymbol.mq4 |
//| Copyright 2007-2014, MetaQuotes Software Corp. |
//| http://www.mql4.com |
//+------------------------------------------------------------------+
#property copyright "2007-2014, MetaQuotes Software Corp."
#property link "http://www.mql4.com"
#property strict
#property indicator_separate_window
#property indicator_buffers 1
#property indicator_minimum 0.0
#property indicator_maximum 0.1
#define SYMBOLS_MAX 1
#define DEALS 0
#define BUY_LOTS 1
#define BUY_PRICE 2
#define SELL_LOTS 3
#define SELL_PRICE 4
#define NET_LOTS 5
#define PROFIT 6
input color InpColor=LightSeaGreen; // Text color
string ExtName="Exposure";
string ExtSymbols[SYMBOLS_MAX];
int ExtSymbolsTotal=0;
double ExtSymbolsSummaries[SYMBOLS_MAX][7];
int ExtLines=-1;
string ExtCols[8]={"Symbol",
"Deals",
"Buy lots",
"Buy price",
"Sell lots",
"Sell price",
"Net lots",
"Profit"};
int ExtShifts[8]={ 10, 80, 130, 180, 260, 310, 390, 460 };
int ExtVertShift=14;
double ExtMapBuffer[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
void OnInit()
{
IndicatorShortName(ExtName);
SetIndexBuffer(0,ExtMapBuffer);
SetIndexStyle(0,DRAW_NONE);
IndicatorDigits(0);
SetIndexEmptyValue(0,0.0);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
{
int windex=WindowFind(ExtName);
if(windex>0)
ObjectsDeleteAll(windex);
}
//+------------------------------------------------------------------+
//| 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[])
{
string name;
int i,col,line,windex=WindowFind(ExtName);
//----
if(windex<0)
return(rates_total);
//---- header line
if(ExtLines<0)
{
for(col=0; col<8; col++)
{
name="Head_"+string(col);
if(ObjectCreate(name,OBJ_LABEL,windex,0,0))
{
ObjectSet(name,OBJPROP_XDISTANCE,ExtShifts[col]);
ObjectSet(name,OBJPROP_YDISTANCE,ExtVertShift);
ObjectSetText(name,ExtCols[col],9,"Arial",InpColor);
}
}
ExtLines=0;
}
//----
ArrayInitialize(ExtSymbolsSummaries,0.0);
int total=Analyze();
if(total>0)
{
line=0;
for(i=0; i<ExtSymbolsTotal; i++)
{
if(ExtSymbolsSummaries[i][DEALS]<=0) continue;
line++;
//---- add line
if(line>ExtLines)
{
int y_dist=ExtVertShift*(line+1)+1;
for(col=0; col<8; col++)
{
name="Line_"+string(line)+"_"+string(col);
if(ObjectCreate(name,OBJ_LABEL,windex,0,0))
{
ObjectSet(name,OBJPROP_XDISTANCE,ExtShifts[col]);
ObjectSet(name,OBJPROP_YDISTANCE,y_dist);
}
}
ExtLines++;
}
//---- set line
int digits=(int)MarketInfo(ExtSymbols[i],MODE_DIGITS);
double buy_lots=ExtSymbolsSummaries[i][BUY_LOTS];
double sell_lots=ExtSymbolsSummaries[i][SELL_LOTS];
double buy_price=0.0;
double sell_price=0.0;
if(buy_lots!=0) buy_price=ExtSymbolsSummaries[i][BUY_PRICE]/buy_lots;
if(sell_lots!=0) sell_price=ExtSymbolsSummaries[i][SELL_PRICE]/sell_lots;
name="Line_"+string(line)+"_0";
ObjectSetText(name,ExtSymbols[i],9,"Arial",InpColor);
name="Line_"+string(line)+"_1";
ObjectSetText(name,DoubleToStr(ExtSymbolsSummaries[i][DEALS],0),9,"Arial",InpColor);
name="Line_"+string(line)+"_2";
ObjectSetText(name,DoubleToStr(buy_lots,2),9,"Arial",InpColor);
name="Line_"+string(line)+"_3";
ObjectSetText(name,DoubleToStr(buy_price,digits),9,"Arial",InpColor);
name="Line_"+string(line)+"_4";
ObjectSetText(name,DoubleToStr(sell_lots,2),9,"Arial",InpColor);
name="Line_"+string(line)+"_5";
ObjectSetText(name,DoubleToStr(sell_price,digits),9,"Arial",InpColor);
name="Line_"+string(line)+"_6";
ObjectSetText(name,DoubleToStr(buy_lots-sell_lots,2),9,"Arial",InpColor);
name="Line_"+string(line)+"_7";
ObjectSetText(name,DoubleToStr(ExtSymbolsSummaries[i][PROFIT],2),9,"Arial",InpColor);
}
}
//---- remove lines
if(total<ExtLines)
{
for(line=ExtLines; line>total; line--)
{
name="Line_"+string(line)+"_0";
ObjectSetText(name,"");
name="Line_"+string(line)+"_1";
ObjectSetText(name,"");
name="Line_"+string(line)+"_2";
ObjectSetText(name,"");
name="Line_"+string(line)+"_3";
ObjectSetText(name,"");
name="Line_"+string(line)+"_4";
ObjectSetText(name,"");
name="Line_"+string(line)+"_5";
ObjectSetText(name,"");
name="Line_"+string(line)+"_6";
ObjectSetText(name,"");
name="Line_"+string(line)+"_7";
ObjectSetText(name,"");
}
}
//---- to avoid minimum==maximum
ExtMapBuffer[Bars-1]=-1;
//----
return(rates_total);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
int Analyze()
{
double profit;
int i,index,type,total=OrdersTotal();
//----
for(i=0; i<total; i++)
{
if(!OrderSelect(i,SELECT_BY_POS)) continue;
type=OrderType();
if(type!=OP_BUY && type!=OP_SELL) continue;
index=SymbolsIndex(OrderSymbol());
if(index<0 || index>=SYMBOLS_MAX) continue;
//----
ExtSymbolsSummaries[index][DEALS]++;
profit=OrderProfit()+OrderCommission()+OrderSwap();
ExtSymbolsSummaries[index][PROFIT]+=profit;
if(type==OP_BUY)
{
ExtSymbolsSummaries[index][BUY_LOTS]+=OrderLots();
ExtSymbolsSummaries[index][BUY_PRICE]+=OrderOpenPrice()*OrderLots();
}
else
{
ExtSymbolsSummaries[index][SELL_LOTS]+=OrderLots();
ExtSymbolsSummaries[index][SELL_PRICE]+=OrderOpenPrice()*OrderLots();
}
}
//----
total=0;
for(i=0; i<ExtSymbolsTotal; i++)
{
if(ExtSymbolsSummaries[i][DEALS]>0) total++;
}
//----
return(total);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
int SymbolsIndex(string SymbolName)
{
bool found=false;
int i;
//----
for(i=0; i<ExtSymbolsTotal; i++)
{
if(SymbolName==ExtSymbols[i])
{
found=true;
break;
}
}
//----
if(found)
return(i);
if(ExtSymbolsTotal>=SYMBOLS_MAX)
return(-1);
//----
i=ExtSymbolsTotal;
ExtSymbolsTotal++;
ExtSymbols[i]=Symbol();
ExtSymbolsSummaries[i][DEALS]=0;
ExtSymbolsSummaries[i][BUY_LOTS]=0;
ExtSymbolsSummaries[i][BUY_PRICE]=0;
ExtSymbolsSummaries[i][SELL_LOTS]=0;
ExtSymbolsSummaries[i][SELL_PRICE]=0;
ExtSymbolsSummaries[i][NET_LOTS]=0;
ExtSymbolsSummaries[i][PROFIT]=0;
//----
return(i);
}
//+------------------------------------------------------------------+
【讨论】：