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頭寸大小計算器 (MT4 MT5指標)[MT5公式]

作者：MT4 MT5 來源：本站原創(chuàng) 發(fā)布時間：2012年05月13日點擊數(shù)：　【收藏到本網(wǎng)的會員中心】

這是為交易商提供的一個免費的在線工具— 頭寸大小計算器。該指標適合MT4和MT5。

頭寸大小計算器 (MetaTrader 指標) — 通過給定進場/止損水平、風險承受水平和當前市場數(shù)據(jù)，比如賬戶大小和貨幣，所交易貨幣對報價貨幣相對賬戶貨幣的價格，來計算頭寸手數(shù)。計算結(jié)果將以文本標簽的形式顯示在主圖表窗口。交易商可以調(diào)整眾多參數(shù)，包括計算和顯示。

輸入?yún)?shù)：

EntryLevel (默認 = 0) — 計劃開啟頭寸的價位。

StopLossLevel (默認 = 0) — 計劃開啟頭寸的止損價位。

Risk (默認 = 1) — 賬戶余額/資產(chǎn)承受風險的百分比點數(shù)。

UseEquityInsteadOfBalance (默認 = false) — 如果選擇true，計算時將以賬戶資金凈值代理賬戶余額。

font_color (默認 = LightBlue/clrLightBlue) — 指標數(shù)據(jù)顯示的字體顏色。

ps_font_color (默認 = Red/clrRed) — 頭寸大小計算結(jié)果的字體顏色。

font_size (默認 = 12) — 顯示文本的字體大小。

font_face (默認 = "Courier") — 指標的字體風格。

corner (默認 = 0/CORNER_LEFT_UPPER) — 指標文本的位置。在MT4上：0 — 代表左上角，1 —代表右上角，2 — 代表左下角，3 — 代表右下角。在MT5上，非常明顯。

distance_x (默認 = 10) — 指標文本的位置到指標文本的水平距離。

distance_y (默認 = 130) — 指標文本的位置到指標文本的垂直距離。

entry_line_color (默認 = Blue/clrBlue) — 入場線的顏色。

stop_loss_line_color (默認 = Lime/clrLime) — 止損線的顏色。

很顯然，該指標不是用來發(fā)出交易信號的。它的作用是幫助外匯交易商計算在他們允許的風險承受水平和給定頭寸參數(shù)的條件下計算頭寸的大小。

該指標需要將計劃開啟訂單的價位和止損參數(shù)設置為非零的數(shù)值。這些值也必須為不同的數(shù)值。您可以將進場/止損線直接在圖表上上下拖拽。頭寸大小會隨著每條線的每次移動而重新計算（僅適用于MT5）。

標簽:MT4 MT5指標源碼

MT4源碼：

//+------------------------------------------------------------------+
//|                                       PositionSizeCalculator.mq4 |
//|                                  Copyright ? 2012, Andriy Moraru |
//+------------------------------------------------------------------+
#property copyright "www.kzuj.com.cn"
#property link      "http://www.kzuj.com.cn"

/*
   Calculates position size based on account balance/equity,
   currency, currency pair, given entry level, stop-loss level
   and risk tolerance (set either in percentage points or in base currency).
*/

#property indicator_chart_window

extern double EntryLevel = 0;
extern double StopLossLevel = 0;
extern double Risk = 1; // Risk tolerance in percentage points
extern double MoneyRisk = 0; // Risk tolerance in base currency
extern bool UseMoneyInsteadOfPercentage = false;
extern bool UseEquityInsteadOfBalance = false;

extern color font_color = LightBlue;
extern color ps_font_color = Red;
extern int font_size = 12;
extern string font_face = "Courier";
extern int corner = 0; //0 - for top-left corner, 1 - top-right, 2 - bottom-left, 3 - bottom-right
extern int distance_x = 10;
extern int distance_y = 15;
extern color entry_line_color = Blue;
extern color stoploss_line_color = Lime;

string QuoteCurrency = "", ReferencePair = "";
double ReferencePrice = 0;
int ReferenceType = -1;
string ModeText, SizeText;
double Size, RiskMoney;
double PositionSize;
double StopLoss;
double UnitCost = 1;

void InitializeReferencePair()
{
   // Try Ask for AccountCurrency/QouteCurrency
   ReferencePair = AccountCurrency() + QuoteCurrency;
   ReferenceType = MODE_ASK;
   ReferencePrice = MarketInfo(ReferencePair, ReferenceType);
   // Try Bid for QuoteCurrency/AccountCurrency
   if (!ReferencePrice)
   {
      ReferencePair = QuoteCurrency + AccountCurrency();
      ReferenceType = MODE_BID;
      ReferencePrice = MarketInfo(ReferencePair, ReferenceType);
   }
   
   if (!ReferencePrice)
   {
      Alert("Failed to detect a proper currency pair for pip valuation.");
      Alert("Try adding all the available currency pairs to Market Watch.");
      ReferenceType = -1;
      return;
   }

   if (ReferenceType == MODE_BID) ModeText = "Bid";
   else if (ReferenceType == MODE_ASK) ModeText = "Ask";
   ObjectCreate("ReferencePair", OBJ_LABEL, 0, 0, 0);
   ObjectSet("ReferencePair", OBJPROP_CORNER, corner);
   ObjectSet("ReferencePair", OBJPROP_XDISTANCE, distance_x);
   ObjectSet("ReferencePair", OBJPROP_YDISTANCE, distance_y + 30);
   ObjectSetText("ReferencePair", ReferencePair + " " + ModeText + ":   " + DoubleToStr(ReferencePrice, Digits), font_size, font_face, font_color);
}

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
{
   if (EntryLevel - StopLossLevel == 0)
   {
      Alert("Entry and Stop-Loss levels should be different and non-zero.");
      return(-1);
   }

   // Determine the symbol quote currency
   if ((StringSubstr(Symbol(), 0, 1) == "#") || (StringFind(Symbol(), ".") != -1) || (StringFind(Symbol(), "_") != -1)) QuoteCurrency = "USD"; // CFD
   else if ((StringLen(Symbol()) != 6) && (StringSubstr(Symbol(), 0, 1) != "m") && (StringSubstr(Symbol(), 0, 1) != "x")) QuoteCurrency = "USD"; // Some commodity?
   else QuoteCurrency = StringSubstr(Symbol(), 3, 3); // Currency pair

   // Need to take into account the rate (Bid or Ask) of a reference currency pair
   // Can do it only if connected to account
   if ((AccountCurrency() != QuoteCurrency) && (AccountCurrency() != "")) InitializeReferencePair();
   
   ObjectCreate("Entry", OBJ_LABEL, 0, 0, 0);
   ObjectSet("Entry", OBJPROP_CORNER, corner);
   ObjectSet("Entry", OBJPROP_XDISTANCE, distance_x);
   ObjectSet("Entry", OBJPROP_YDISTANCE, distance_y);
   ObjectSetText("Entry", "Entry Lvl:    " + DoubleToStr(EntryLevel, Digits), font_size, font_face, font_color);

   ObjectCreate("EntryLine", OBJ_HLINE, 0, Time[0], EntryLevel);
   ObjectSet("EntryLine", OBJPROP_STYLE, STYLE_SOLID);
   ObjectSet("EntryLine", OBJPROP_COLOR, entry_line_color);
   ObjectSet("EntryLine", OBJPROP_WIDTH, 1);

   ObjectCreate("StopLoss", OBJ_LABEL, 0, 0, 0);
   ObjectSet("StopLoss", OBJPROP_CORNER, corner);
   ObjectSet("StopLoss", OBJPROP_XDISTANCE, distance_x);
   ObjectSet("StopLoss", OBJPROP_YDISTANCE, distance_y + 15);
   ObjectSetText("StopLoss", "Stop-Loss:    " + DoubleToStr(StopLossLevel, Digits), font_size, font_face, font_color);
   
   ObjectCreate("StopLossLine", OBJ_HLINE, 0, Time[0], StopLossLevel);
   ObjectSet("StopLossLine", OBJPROP_STYLE, STYLE_SOLID);
   ObjectSet("StopLossLine", OBJPROP_COLOR, stoploss_line_color);
   ObjectSet("StopLossLine", OBJPROP_WIDTH, 1);

   StopLoss = MathAbs(EntryLevel - StopLossLevel);
   
   if (!UseMoneyInsteadOfPercentage)
   {
      ObjectCreate("Risk", OBJ_LABEL, 0, 0, 0);
      ObjectSet("Risk", OBJPROP_CORNER, corner);
      ObjectSet("Risk", OBJPROP_XDISTANCE, distance_x);
      ObjectSet("Risk", OBJPROP_YDISTANCE, distance_y + 45);
      ObjectSetText("Risk", "Risk:         " + DoubleToStr(Risk, 2) + "%", font_size, font_face, font_color);
   }
   
   if (UseEquityInsteadOfBalance)
   {
      SizeText = "Equity";
      Size = AccountEquity();
   }
   else
   {
      SizeText = "Balance";
      Size = AccountBalance();
   }
   ObjectCreate("AccountSize", OBJ_LABEL, 0, 0, 0);
   ObjectSet("AccountSize", OBJPROP_CORNER, corner);
   ObjectSet("AccountSize", OBJPROP_XDISTANCE, distance_x);
   ObjectSet("AccountSize", OBJPROP_YDISTANCE, distance_y + 60);
   ObjectSetText("AccountSize", "Acc. " + SizeText + ": " + DoubleToStr(Size, 2), font_size, font_face, font_color);
   
   if (!UseMoneyInsteadOfPercentage) RiskMoney = Size * Risk / 100;
   else RiskMoney = MoneyRisk;
   ObjectCreate("RiskMoney", OBJ_LABEL, 0, 0, 0);
   ObjectSet("RiskMoney", OBJPROP_CORNER, corner);
   ObjectSet("RiskMoney", OBJPROP_XDISTANCE, distance_x);
   ObjectSet("RiskMoney", OBJPROP_YDISTANCE, distance_y + 75);
   ObjectSetText("RiskMoney", "Risk, money:  " + DoubleToStr(RiskMoney, 2), font_size, font_face, font_color);
   
   
   if (ReferenceType == MODE_ASK)
   {
      RefreshRates();
      ReferencePrice = MarketInfo(ReferencePair, ReferenceType);
      UnitCost = 1 / ReferencePrice;
   }
	else if (ReferenceType == MODE_BID)
	{
      RefreshRates();
      ReferencePrice = MarketInfo(ReferencePair, ReferenceType);
      UnitCost = ReferencePrice;
   }

   ObjectCreate("PositionSize", OBJ_LABEL, 0, 0, 0);
   ObjectSet("PositionSize", OBJPROP_CORNER, corner);
   ObjectSet("PositionSize", OBJPROP_XDISTANCE, distance_x);
   ObjectSet("PositionSize", OBJPROP_YDISTANCE, distance_y + 90);

   if ((ReferenceType != -1) && (AccountCurrency() != QuoteCurrency)) return(0);

   PositionSize = (RiskMoney / StopLoss) / 100000 / UnitCost;
   ObjectSetText("PositionSize", "Pos. Size:    " + DoubleToStr(PositionSize, 2), font_size + 1, font_face, ps_font_color);

   return(0);
}

//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
{
   ObjectDelete("Entry");
   ObjectDelete("EntryLine");
   ObjectDelete("StopLoss");
   ObjectDelete("StopLossLine");
   if (!UseMoneyInsteadOfPercentage) ObjectDelete("Risk"); // Otherwise wasn't created.
   ObjectDelete("ReferencePair");
   ObjectDelete("AccountSize");
   ObjectDelete("RiskMoney");
   ObjectDelete("PositionSize");
   return(0);
}

//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
{
   if (EntryLevel - StopLossLevel == 0) return(0);
   
   // Need to initialize reference pair because we couldn't do it in init() as the there was no connection to account
   if ((AccountCurrency() != QuoteCurrency) && (ReferencePair == ""))
   {
      if (AccountCurrency() == "") return(0);
      InitializeReferencePair();
   }
   
   double tEntryLevel = ObjectGet("EntryLine", OBJPROP_PRICE1);
   double tStopLossLevel = ObjectGet("StopLossLine", OBJPROP_PRICE1);
   ObjectSetText("Entry", "Entry Lvl:    " + DoubleToStr(tEntryLevel, Digits), font_size, font_face, font_color);
   ObjectSetText("StopLoss", "Stop-Loss:    " + DoubleToStr(tStopLossLevel, Digits), font_size, font_face, font_color);

   StopLoss = MathAbs(tEntryLevel - tStopLossLevel);

   if (UseEquityInsteadOfBalance) Size = AccountEquity();
   else Size = AccountBalance();
   ObjectSetText("AccountSize", "Acc. " + SizeText + ": " + DoubleToStr(Size, 2), font_size, font_face, font_color);

   if (!UseMoneyInsteadOfPercentage) RiskMoney = Size * Risk / 100;
   else RiskMoney = MoneyRisk;
   ObjectSetText("RiskMoney", "Risk, money:  " + DoubleToStr(RiskMoney, 2), font_size, font_face, font_color);

   if (ReferenceType != -1)
   {
      ReferencePrice = MarketInfo(ReferencePair, ReferenceType);
      ObjectSetText("ReferencePair", ReferencePair + " " + ModeText + ":   " + DoubleToStr(ReferencePrice, Digits), font_size, font_face, font_color);
   
      if (ReferenceType == MODE_ASK) UnitCost = 1 / ReferencePrice;
	   else if (ReferenceType == MODE_BID) UnitCost = ReferencePrice;
   }

   PositionSize = (RiskMoney / StopLoss) / 100000 / UnitCost;
   
   ObjectSetText("PositionSize", "Pos. Size:    " + DoubleToStr(PositionSize, 2), font_size + 1, font_face, ps_font_color);
   
   return(0);
}
//+------------------------------------------------------------------+

MT5源碼：

//+------------------------------------------------------------------+
//|                                       PositionSizeCalculator.mq5 |
//|                                  Copyright ? 2012, Andriy Moraru |
//+------------------------------------------------------------------+
#property copyright "www.kzuj.com.cn"
#property link      "http://www.kzuj.com.cn"
#property version   "1.1"

#property description "Calculates position size based on account balance/equity,"
#property description "currency, currency pair, given entry level, stop-loss level"
#property description "and risk tolerance (set either in percentage points or in base currency)."
#property description " "
#property description "2012-05-10, ver. 1.1 - added support for setting risk in money."

#property indicator_chart_window

input double EntryLevel = 0;
input double StopLossLevel = 0;
input double Risk = 1; // Risk tolerance in percentage points
input double MoneyRisk = 0; // Risk tolerance in base currency
input bool UseMoneyInsteadOfPercentage = false;
input bool UseEquityInsteadOfBalance = false;

input color font_color = clrLightBlue;
input color ps_font_color = clrRed;
input int font_size = 12;
input string font_face = "Courier";
input ENUM_BASE_CORNER corner = CORNER_LEFT_UPPER;
input int distance_x = 10;
input int distance_y = 15;
input color entry_line_color = clrBlue;
input color stoploss_line_color = clrLime;

string QuoteCurrency = "", ReferencePair = "";
double ReferencePrice = 0;
ENUM_SYMBOL_INFO_DOUBLE ReferenceType = -1;
string ModeText, SizeText;
double Size, RiskMoney;
double PositionSize;
double StopLoss;
double UnitCost = 1;

void InitializeReferencePair()
{
   // Try Ask for AccountCurrency/QouteCurrency
   ReferencePair = AccountInfoString(ACCOUNT_CURRENCY) + QuoteCurrency;
   ReferenceType = SYMBOL_ASK;
   ReferencePrice = SymbolInfoDouble(ReferencePair, ReferenceType);
   // Try Bid for QuoteCurrency/AccountCurrency
   if (!ReferencePrice)
   {
      ReferencePair = QuoteCurrency + AccountInfoString(ACCOUNT_CURRENCY);
      ReferenceType = SYMBOL_BID;
      ReferencePrice = SymbolInfoDouble(ReferencePair, ReferenceType);
   }
   
   if (!ReferencePrice)
   {
      Alert("Failed to detect a proper currency pair for pip valuation.");
      Alert("Try adding all the available currency pairs to Market Watch.");
      ReferenceType = -1;
      return;
   }

   if (ReferenceType == SYMBOL_BID) ModeText = "Bid";
   else if (ReferenceType == SYMBOL_ASK) ModeText = "Ask";
   ObjectCreate(0, "ReferencePair", OBJ_LABEL, 0, 0, 0);
   ObjectSetInteger(0, "ReferencePair", OBJPROP_CORNER, corner);
   ObjectSetInteger(0, "ReferencePair", OBJPROP_XDISTANCE, distance_x);
   ObjectSetInteger(0, "ReferencePair", OBJPROP_YDISTANCE, distance_y + 30);
   ObjectSetString(0, "ReferencePair", OBJPROP_TEXT, ReferencePair + " " + ModeText + ":   " + DoubleToString(ReferencePrice, _Digits));
   ObjectSetInteger(0, "ReferencePair", OBJPROP_FONTSIZE, font_size);
   ObjectSetString(0, "ReferencePair", OBJPROP_FONT, font_face);
   ObjectSetInteger(0, "ReferencePair", OBJPROP_COLOR, font_color);
}

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
void OnInit()
{
   if (EntryLevel - StopLossLevel == 0)
   {
      Alert("Entry and Stop-Loss levels should be different and non-zero.");
      return;
   }

   // Determine the symbol quote currency
   if ((StringSubstr(Symbol(), 0, 1) == "#") || (StringFind(Symbol(), ".") != -1) || (StringFind(Symbol(), "_") != -1)) QuoteCurrency = "USD"; // CFD
   else if ((StringLen(Symbol()) != 6) && (StringSubstr(Symbol(), 0, 1) != "m") && (StringSubstr(Symbol(), 0, 1) != "x")) QuoteCurrency = "USD"; // Some commodity?
   else QuoteCurrency = StringSubstr(Symbol(), 3, 3); // Currency pair

   // Need to take into account the rate (Bid or Ask) of a reference currency pair
   // Can do it only if connected to account
   if ((AccountInfoString(ACCOUNT_CURRENCY) != QuoteCurrency) && (AccountInfoString(ACCOUNT_CURRENCY) != "")) InitializeReferencePair();
   
   ObjectCreate(0, "Entry", OBJ_LABEL, 0, 0, 0);
   ObjectSetInteger(0, "Entry", OBJPROP_CORNER, corner);
   ObjectSetInteger(0, "Entry", OBJPROP_XDISTANCE, distance_x);
   ObjectSetInteger(0, "Entry", OBJPROP_YDISTANCE, distance_y);
   ObjectSetString(0, "Entry", OBJPROP_TEXT, "Entry Lvl:    " + DoubleToString(EntryLevel, _Digits));
   ObjectSetInteger(0, "Entry", OBJPROP_FONTSIZE, font_size);
   ObjectSetString(0, "Entry", OBJPROP_FONT, font_face);
   ObjectSetInteger(0, "Entry", OBJPROP_COLOR, font_color);

   
   ObjectCreate(0, "EntryLine", OBJ_HLINE, 0, TimeCurrent(), EntryLevel);
   ObjectSetInteger(0, "EntryLine", OBJPROP_STYLE, STYLE_SOLID);
   ObjectSetInteger(0, "EntryLine", OBJPROP_COLOR, entry_line_color);
   ObjectSetInteger(0, "EntryLine", OBJPROP_WIDTH, 1);
   ObjectSetInteger(0, "EntryLine", OBJPROP_SELECTABLE, true);

   ObjectCreate(0, "StopLoss", OBJ_LABEL, 0, 0, 0);
   ObjectSetInteger(0, "StopLoss", OBJPROP_CORNER, corner);
   ObjectSetInteger(0, "StopLoss", OBJPROP_XDISTANCE, distance_x);
   ObjectSetInteger(0, "StopLoss", OBJPROP_YDISTANCE, distance_y + 15);
   ObjectSetString(0, "StopLoss", OBJPROP_TEXT, "Stop-Loss:    " + DoubleToString(StopLossLevel, _Digits));
   ObjectSetInteger(0, "StopLoss", OBJPROP_FONTSIZE, font_size);
   ObjectSetString(0, "StopLoss", OBJPROP_FONT, font_face);
   ObjectSetInteger(0, "StopLoss", OBJPROP_COLOR, font_color);

   ObjectCreate(0, "StopLossLine", OBJ_HLINE, 0, TimeCurrent(), StopLossLevel);
   ObjectSetInteger(0, "StopLossLine", OBJPROP_STYLE, STYLE_SOLID);
   ObjectSetInteger(0, "StopLossLine", OBJPROP_COLOR, stoploss_line_color);
   ObjectSetInteger(0, "StopLossLine", OBJPROP_WIDTH, 1);
   ObjectSetInteger(0, "StopLossLine", OBJPROP_SELECTABLE, true);

   StopLoss = MathAbs(EntryLevel - StopLossLevel);
   
   if (!UseMoneyInsteadOfPercentage)
   {
      ObjectCreate(0, "Risk", OBJ_LABEL, 0, 0, 0);
      ObjectSetInteger(0, "Risk", OBJPROP_CORNER, corner);
      ObjectSetInteger(0, "Risk", OBJPROP_XDISTANCE, distance_x);
      ObjectSetInteger(0, "Risk", OBJPROP_YDISTANCE, distance_y + 45);
      ObjectSetString(0, "Risk", OBJPROP_TEXT, "Risk:         " + DoubleToString(Risk, 2) + "%");
      ObjectSetInteger(0, "Risk", OBJPROP_FONTSIZE, font_size);
      ObjectSetString(0, "Risk", OBJPROP_FONT, font_face);
      ObjectSetInteger(0, "Risk", OBJPROP_COLOR, font_color);
   }
   
   if (UseEquityInsteadOfBalance)
   {
      SizeText = "Equity";
      Size = AccountInfoDouble(ACCOUNT_EQUITY);
   }
   else
   {
      SizeText = "Balance";
      Size = AccountInfoDouble(ACCOUNT_BALANCE);
   }
   ObjectCreate(0, "AccountSize", OBJ_LABEL, 0, 0, 0);
   ObjectSetInteger(0, "AccountSize", OBJPROP_CORNER, corner);
   ObjectSetInteger(0, "AccountSize", OBJPROP_XDISTANCE, distance_x);
   ObjectSetInteger(0, "AccountSize", OBJPROP_YDISTANCE, distance_y + 60);
   ObjectSetString(0, "AccountSize", OBJPROP_TEXT, "Acc. " + SizeText + ": " + DoubleToString(Size, 2));
   ObjectSetInteger(0, "AccountSize", OBJPROP_FONTSIZE, font_size);
   ObjectSetString(0, "AccountSize", OBJPROP_FONT, font_face);
   ObjectSetInteger(0, "AccountSize", OBJPROP_COLOR, font_color);
   
   if (!UseMoneyInsteadOfPercentage) RiskMoney = Size * Risk / 100;
   else RiskMoney = MoneyRisk;
   ObjectCreate(0, "RiskMoney", OBJ_LABEL, 0, 0, 0);
   ObjectSetInteger(0, "RiskMoney", OBJPROP_CORNER, corner);
   ObjectSetInteger(0, "RiskMoney", OBJPROP_XDISTANCE, distance_x);
   ObjectSetInteger(0, "RiskMoney", OBJPROP_YDISTANCE, distance_y + 75);
   ObjectSetString(0, "RiskMoney", OBJPROP_TEXT, "Risk, money:  " + DoubleToString(RiskMoney, 2));
   ObjectSetInteger(0, "RiskMoney", OBJPROP_FONTSIZE, font_size);
   ObjectSetString(0, "RiskMoney", OBJPROP_FONT, font_face);
   ObjectSetInteger(0, "RiskMoney", OBJPROP_COLOR, font_color);
   
   
   if (ReferenceType == SYMBOL_ASK)
   {
      ReferencePrice = SymbolInfoDouble(ReferencePair, ReferenceType);
      UnitCost = 1 / ReferencePrice;
   }
	else if (ReferenceType == SYMBOL_BID)
	{
      ReferencePrice = SymbolInfoDouble(ReferencePair, ReferenceType);
      UnitCost = ReferencePrice;
   }

   ObjectCreate(0, "PositionSize", OBJ_LABEL, 0, 0, 0);
   ObjectSetInteger(0, "PositionSize", OBJPROP_CORNER, corner);
   ObjectSetInteger(0, "PositionSize", OBJPROP_XDISTANCE, distance_x);
   ObjectSetInteger(0, "PositionSize", OBJPROP_YDISTANCE, distance_y + 90);
   ObjectSetInteger(0, "PositionSize", OBJPROP_FONTSIZE, font_size + 1);
   ObjectSetString(0, "PositionSize", OBJPROP_FONT, font_face);
   ObjectSetInteger(0, "PositionSize", OBJPROP_COLOR, ps_font_color);

   if ((ReferenceType != -1) && (AccountInfoString(ACCOUNT_CURRENCY) != QuoteCurrency)) return;

   PositionSize = (RiskMoney / StopLoss) / 100000 / UnitCost;
   ObjectSetString(0, "PositionSize", OBJPROP_TEXT, "Pos. Size:    " + DoubleToString(PositionSize, 2));
}

//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
{
   ObjectDelete(0, "Entry");
   ObjectDelete(0, "EntryLine");
   ObjectDelete(0, "StopLoss");
   ObjectDelete(0, "StopLossLine");
   if (!UseMoneyInsteadOfPercentage) ObjectDelete(0, "Risk"); // Otherwise wasn't created.
   ObjectDelete(0, "ReferencePair");
   ObjectDelete(0, "AccountSize");
   ObjectDelete(0, "RiskMoney");
   ObjectDelete(0, "PositionSize");
}

//+------------------------------------------------------------------+
//| Main recalculation function used on every tick and on entry/SL   |
//| line drag                                                        |
//+------------------------------------------------------------------+
void RecalculatePositionSize()
{
   if (EntryLevel - StopLossLevel == 0) return;
   
   // Need to initialize reference pair because we couldn't do it in init() as the there was no connection to account
   if ((AccountInfoString(ACCOUNT_CURRENCY) != QuoteCurrency) && (ReferencePair == ""))
   {
      if (AccountInfoString(ACCOUNT_CURRENCY) == "") return;
      InitializeReferencePair();
   }
   
   double tEntryLevel = ObjectGetDouble(0, "EntryLine", OBJPROP_PRICE);
   double tStopLossLevel = ObjectGetDouble(0, "StopLossLine", OBJPROP_PRICE);
   ObjectSetString(0, "Entry", OBJPROP_TEXT, "Entry Lvl:    " + DoubleToString(tEntryLevel, _Digits));
   ObjectSetString(0, "StopLoss", OBJPROP_TEXT, "Stop-Loss:    " + DoubleToString(tStopLossLevel, _Digits));

   StopLoss = MathAbs(tEntryLevel - tStopLossLevel);

   if (UseEquityInsteadOfBalance) Size = AccountInfoDouble(ACCOUNT_EQUITY);
   else Size = AccountInfoDouble(ACCOUNT_BALANCE);
   ObjectSetString(0, "AccountSize", OBJPROP_TEXT, "Acc. " + SizeText + ": " + DoubleToString(Size, 2));

   if (!UseMoneyInsteadOfPercentage) RiskMoney = Size * Risk / 100;
   else RiskMoney = MoneyRisk;
   ObjectSetString(0, "RiskMoney", OBJPROP_TEXT, "Risk, money:  " + DoubleToString(RiskMoney, 2));

   if (ReferenceType != -1)
   {
      ReferencePrice = SymbolInfoDouble(ReferencePair, ReferenceType);
      ObjectSetString(0, "ReferencePair", OBJPROP_TEXT, ReferencePair + " " + ModeText + ":   " + DoubleToString(ReferencePrice, _Digits));
   
      if (ReferenceType == SYMBOL_ASK) UnitCost = 1 / ReferencePrice;
	   else if (ReferenceType == SYMBOL_BID) UnitCost = ReferencePrice;
   }

   PositionSize = (RiskMoney / StopLoss) / 100000 / UnitCost;
   
   ObjectSetString(0, "PositionSize", OBJPROP_TEXT, "Pos. Size:    " + DoubleToString(PositionSize, 2));
}

//+------------------------------------------------------------------+
//| Object dragging handler                                          |
//+------------------------------------------------------------------+
void OnChartEvent(const int id,         // Event ID
                  const long& lparam,   // Parameter of type long event
                  const double& dparam, // Parameter of type double event
                  const string& sparam  // Parameter of type string events
)
{
   if (id != CHARTEVENT_OBJECT_DRAG) return;
   if ((sparam != "EntryLine") && (sparam != "StopLossLine")) return;
   RecalculatePositionSize();
}

int OnCalculate(const int rates_total,      // size of the price[] array
                 const int prev_calculated,  // bars handled on a previous call
                 const int begin,            // where the significant data start from
                 const double& price[]       // array to calculate
)
{
   RecalculatePositionSize();
   return(rates_total);
}
//+------------------------------------------------------------------+

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頭寸大小計算器 (MT4 MT5指標)[MT5公式]

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