trade.buy() method (Stocks)

[Ralph Freshour]

What kind of data should I be putting in the trade.buy.volume property? Is this the number of shares I wish to buy? In some of the MT5 code I see values like 0.10 but I don't know what that means.

Thank you...

[Vladimir Karputov]

Ralph Freshour:

What kind of data should I be putting in the trade.buy.volume property? Is this the number of shares I wish to buy? In some of the MT5 code I see values like 0.10 but I don't know what that means.

Thank you...

Buy

Opens a long position with specified parameters.

bool  Buy(
   double        volume,          // position volume
   const string  symbol=NULL,     // symbol
   double        price=0.0,       // execution price
   double        sl=0.0,          // stop loss price
   double        tp=0.0,          // take profit price
   const string  comment=""       // comment
   )

Parameters

volume

[in]  Requested position volume.

So 'volume' is the volume you want to buy. Stocks (very often) have a multiple of '1', but for forex trading, the volume (very often) is a multiple of '0.01'.

[Ralph Freshour]

Vladimir Karputov:

Buy

Opens a long position with specified parameters.

Parameters

volume

[in]  Requested position volume.

So 'volume' is the volume you want to buy. Stocks (very often) have a multiple of '1', but for forex trading, the volume (very often) is a multiple of '0.01'.

So if I wanted to buy 20 (stock) shares, then I would specify a double data type such as: 20.0  correct?

[Vladimir Karputov]

Ralph Freshour :

So if I wanted to buy 20 (stock) shares, then I would specify a double data type such as: 20.0  correct?

Yes, the volume is specified with type ' double '

 double         volume,           // position volume 

[Ralph Freshour]

After I posted my question I read that stock volume is given in Lots, where 1 'round' lot is 100 shares of stock. 'Odd' lots are less than 100 shares.

So if I set my buy volume to 1.0 then I would be asking to buy 100 shares of a given stock.

[Vladimir Karputov]

Ralph Freshour :

After I posted my question I read that stock volume is given in Lots, where 1 'round' lot is 100 shares of stock. 'Odd' lots are less than 100 shares.

So if I set my buy volume to 1.0 then I would be asking to buy 100 shares of a given stock.

Mathematics, third grade:

 1 != 100 

:)

[Vladimir Karputov]

Yet:

SYMBOL_VOLUME_MIN not always equal SYMBOL_TRADE_CONTRACT_SIZE

[Vladimir Karputov]

Use script:

//+------------------------------------------------------------------+
//|                                         All Symbols all path.mq5 |
//+------------------------------------------------------------------+
#property version   "1.001"
//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
  {
//---
   string array[][4]; // [][0] - Symbol, [][1] - Path, [][1] - Volume min
   int total=SymbolsTotal(false);
   ArrayResize(array,total);
   for(int i=0; i<total; i++)
     {
      string name=SymbolName(i,false);
      array[i][0]=name;
      array[i][1]=SymbolInfoString(name,SYMBOL_PATH);
      array[i][2]=DoubleToString(SymbolInfoDouble(name,SYMBOL_VOLUME_MIN),2);
      array[i][3]=DoubleToString(SymbolInfoDouble(name,SYMBOL_TRADE_CONTRACT_SIZE),2);
     }
   string array_description[4]= {"Symbol","Path","Volume min","Contract size"};
   ArrayPrint(array_description);
   ArrayPrint(array);
  }
//+------------------------------------------------------------------+

result:

[  43,] "LKOH.MM"                         "Stock Markets\Russia\MICEX20\LKOH.MM"               "1.00"                       "1.00"                                              
[  44,] "MAGN.MM"                         "Stock Markets\Russia\MICEX Other\MAGN.MM"           "1.00"                       "100.00"                                            
[  45,] "MGNT.MM"                         "Stock Markets\Russia\MICEX20\MGNT.MM"               "1.00"                       "1.00"                                              
[  46,] "MOEX.MM"                         "Stock Markets\Russia\MICEX20\MOEX.MM"               "1.00"                       "10.00"                                             
[  47,] "USDHKD"                          "Forex\Forex\USDHKD"                                 "0.01"                       "100000.00"                                         
[  48,] "USDILS"                          "Forex\Forex\USDILS"                                 "0.01"                       "100000.00"                                         
[  49,] "USDMXN"                          "Forex\Forex\USDMXN"                                 "0.01"                       "100000.00"                                         
[  50,] "MTSS.MM"                         "Stock Markets\Russia\MICEX20\MTSS.MM"               "1.00"                       "10.00"                                             
[  51,] "NLMK.MM"                         "Stock Markets\Russia\MICEX20\NLMK.MM"               "1.00"                       "10.00"                                             
[  52,] "NOKSEK"                          "Forex\Forex\NOKSEK"                                 "0.01"                       "100000.00"