Amount of Bars, which is added by Add()

[agafon2]

CalculateOnBarClose=true

And extra question:

In one place of code i write to binary file:

                using (FileStream stream = new FileStream("E:\\Alpari\\history\\Alpari-Demo\\"+c_symbol+i_period+".hst", FileMode.Create)){
                  //Log("FileStream: "+stream, NinjaTrader.Cbi.LogLevel.Information);                    
                  using (BinaryWriter writer = new BinaryWriter(stream))
                    {
                      //---- Write history file header    
                      c_copyright="(C)opyright 2003, MetaQuotes Software Corp.";    
                      writer.Write(version);
                      writer.Write(c_copyright);
                      writer.Write(c_symbol);
                      writer.Write(i_period);                    
                      writer.Write(i_digits);
                      writer.Write(0);
                      writer.Write(0);
                      for (int i=0; i<13; i++) {
                        writer.Write(i_unused[i]);    
                      }
                      //writer.Close();
                    }
                }

In other place of code i want to countinue to write to this file from last using position

How can i do it?

[NinjaTrader_Joydeep]

Hello agafon2,
Thanks for the confirmation.

If you set CalculateOnBarClose (COBC) to false then are you refer to Count -1.

If you set COBC) to true then you have to refer it as Count - 2.


To initialize any value we suggest using the OnStartUp method.

If you want to do a job repeatedly then assign the code to the OnBarUpdate section of the code.

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?onstartup.htm

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?onbarupdate.htm

[agafon2]

In one place of code i write to binary file:

                using (FileStream stream = new  FileStream("E:\\Alpari\\history\\Alpari-Demo\\"+c_symbol+i_period+".hst",  FileMode.Create)){
                  //Log("FileStream: "+stream, NinjaTrader.Cbi.LogLevel.Information);                    
                  using (BinaryWriter writer = new BinaryWriter(stream))
                    {
                      //---- Write history file header    
                      c_copyright="(C)opyright 2003, MetaQuotes Software Corp.";    
                      writer.Write(version);
                      writer.Write(c_copyright);
                      writer.Write(c_symbol);
                      writer.Write(i_period);                    
                      writer.Write(i_digits);
                      writer.Write(0);
                      writer.Write(0);
                      for (int i=0; i<13; i++) {
                        writer.Write(i_unused[i]);    
                      }
                      //writer.Close();
                    }
                }

In other place of code i want to countinue to write to this file from last using position

How can i do it?

[NinjaTrader_Joydeep]

Hello agafon2,
If you want to write the values once then we suggest using the OnStartUp event.

http://www.ninjatrader.com/support/h...?onstartup.htm

If you want to do a job repeatedly then assign the code to the OnBarUpdate section of the code.

http://www.ninjatrader.com/support/h...nbarupdate.htm

[agafon2]

I want to continue to write to binary file and after

using (FileStream stream = new FileStream("E:\\Terminal_Alpari\\history\\Alpari-Demo\\"+c_symbol+i_period+".hst", FileMode.Create)){
                  //Log("FileStream: "+stream, NinjaTrader.Cbi.LogLevel.Information);                    
                  using (BinaryWriter writer = new BinaryWriter(stream))
                    {
                      //---- Write history file header    
                      c_copyright="(C)opyright 2003, MetaQuotes Software Corp.";    
                      writer.Write((long)version);
                      writer.Write(c_copyright);
                      writer.Write(c_symbol);
                      writer.Write((long)i_period);                    
                      writer.Write(i_digits);
                      writer.Write((long)0);
                      writer.Write((long)0);
                      for (int i=0; i<13; i++) {
                        writer.Write(i_unused[i]);    
                      }
                      //writer.Close();
                    }
                }

i use this code to continue to write:

                       using (BinaryWriter writer = new BinaryWriter(stream))
                         {         
                           writer.Write(i_time);
                           writer.Write(d_low);
                           writer.Write(d_high);
                           writer.Write(d_close);
                           writer.Write(d_volume);
                           writer.Flush();
                         }

But it doesn't work - it can't find stream
How to continue to write to the opend binary file?

[NinjaTrader_Joydeep]

Hello agafon2,
Unfortunately this is more of a C# query and beyond what could support. I would however leave the thread open for our forum members for their valuable inputs.

[agafon2]

Can you help me, please, to rewrite this code

//---- History header
   int    version=400;
   string c_copyright;
   string c_symbol=Symbol();
   int    i_period=Period()*ExtPeriodMultiplier;
   int    i_digits=Digits;
   int    i_unused[13];
//----  
   ExtHandle=FileOpenHistory(c_symbol+i_period+".hst", FILE_BIN|FILE_WRITE);
   if(ExtHandle < 0) return(-1);
//---- write history file header
   c_copyright="(C)opyright 2003, MetaQuotes Software Corp.";
   FileWriteInteger(ExtHandle, version, LONG_VALUE);
   FileWriteString(ExtHandle, c_copyright, 64);
   FileWriteString(ExtHandle, c_symbol, 12);
   FileWriteInteger(ExtHandle, i_period, LONG_VALUE);
   FileWriteInteger(ExtHandle, i_digits, LONG_VALUE);
   FileWriteInteger(ExtHandle, 0, LONG_VALUE);       //timesign
   FileWriteInteger(ExtHandle, 0, LONG_VALUE);       //last_sync
   FileWriteArray(ExtHandle, i_unused, 0, 13);

to NinjaScript
Here is an explaination of File functions:

http://docs.mql4.com/files

There is my variant, but it isn't work corectly:

                c_symbol=Instrument.FullName;
                i_period=BarsPeriod.Value*ExtPeriodMultiplier;
                //----
                // Set the stringformat parameter for decimal places to suit the instrument.
                // This ensures that trailing zeros are always displayed - maybe an easier way to do this?
                double temp1 = TickSize - (int)TickSize;// get fractional part of TickSize
                decimals = temp1.ToString(); // make it into a string
                int tickLength = decimals.Length; // get the number of characters in the string
                switch (tickLength) // set format depending on length of string
                {
                  case 1: decimals = "f0"; // eg YM 1t = 1 point
                          i_digits = 0;
                  break;
                  case 3: decimals = "f1"; // eg ER2 1t = 0.1 point
                          i_digits = 1;                        
                  break;
                  case 4: decimals = "f2"; // eg NQ 1t = 0.25 point
                          i_digits = 2;                        
                  break; 
                  case 5: decimals = "f3"; // eg 1t = 0.001 point
                          i_digits = 3;                        
                  break;
                  case 6: decimals = "f4"; // eg 6E 1t = 0.0001 point
                          i_digits = 4;                                                
                  break;
                  case 7: decimals = "f5"; // eg 1t = 0.00001 point
                          i_digits = 5;                        
                  break;
                  default: decimals = ""; // default is no fixed decimal format
                          i_digits = 0;
                  break;
                  // more options can be added if neccessary......
                }
                //Log("i_digits: "+i_digits, NinjaTrader.Cbi.LogLevel.Information);
                using (FileStream stream = new FileStream("E:\\Terminal_Alpari\\history\\Alpari-Demo\\"+c_symbol+i_period+".hst", FileMode.Create)){
                  //Log("FileStream: "+stream, NinjaTrader.Cbi.LogLevel.Information);                    
                  using (BinaryWriter writer = new BinaryWriter(stream))
                    {
                      //---- Write history file header    
                      c_copyright="(C)opyright 2003, MetaQuotes Software Corp.";

                      writer.Write((long)version);
                      writer.Write(c_copyright);                
                      writer.Write(c_symbol);                
                      writer.Write((long)i_period);                    
                      writer.Write((long)i_digits);
                      writer.Write((long)0);
                      writer.Write((long)0);
                      for (int j=0; j<13; j++) {
                        writer.Write(i_unused[j]);    
                      }
                      //writer.Close();
                    }
                }

[agafon2]

                       using (FileStream stream = new FileStream("E:\\Alpari\\history\\Alpari-Demo\\"+c_symbol+i_period+".hst", FileMode.Append)){
                         using (BinaryWriter writer = new BinaryWriter(stream)){
                           writer.Write(Open[0]);    
                            writer.Close();                            
                         }
                       }

Open[0] looks like 1,3424 - with comma
How does look like a result of writing: writer.Write(Open[0]) - with comma like 1.3424 or dot: 1.3424?

[NinjaTrader_Joydeep]

Hello agafon2,
You have to format the prints accordingly using the CultureInfo class. A sample code will be like:

Print(Open[0].ToString(new System.Globalization.CultureInfo("en-US")));

http://msdn.microsoft.com/en-us/library/system.iformatprovider.aspx

[koganam]

Result of this code is like:
1358971008,03289
How to get an integer part of this number?
For example, for number 1358971008,03289 integer part is 1358971008

You cast it to an integer. e.g.,

double NumDouble = 125784.233;
int NumInt = (int)NumDouble;

[agafon2]

Hello
Expalin me, please, what is unit of measurement of Volume[] data. Is it measures in lots or not?

Image: http://saveimg.ru/show-image.php?id=717ca78b52e5e13f3015e320e8519f8b

[agafon2]

Please, give an answer on my last question

[NinjaTrader_Joydeep]

Hello agafon2,
Yes, volume for futures contracts are measured in lots/number of contracts traded.

[agafon2]

Ok, thanks, i understood about unit of measurement of volume, but i have new question:

Why Last Volume is so small (1,2 lots for example), when Bid and Ask is more greater (28, 50 lots for example), than Last volume in the same time?

Look at this pictures, please:

http://saveimg.ru/show-image.php?id=792714b730b5f910a47e7c43d0b9de83

http://saveimg.ru/show-image.php?id=64ac81b9fb678e4027ce5ba1a8592ca9

http://saveimg.ru/show-image.php?id=c42912151e7cda5c1f11615d190ff3d6

[NinjaTrader_Joydeep]

Hello agafon2,
Last volume is the traded volume while the Bid/Ask Volume represents the number of contracts available only for trading at that price (and have not yet traded).