Some help needed

Qæs 2014.02.14 14:50

I am trying to code an EA based on my own strategy, with the help of code from some other EAs and indis. but now stuck in one thing.

(user defined lot sizes for each trade)

extern string LotsProgression="0.1;0.1;0.2;0.3;0.4;0.6;0.8;1.1;1.5;2.0;2.7;3.6;4.7;6.2;8.0;10.2;13.0;16.5;20.8;26.3;33.1;41.6;52.2;65.5;82.5;103.9;130.9;165;207.9;262;330.1;416;524.7;661.1";

extern bool RestartNewCycle = true;

(and the code)

int init()

{

int i,j,k;

string ls;

while (true) {

        j=StringFind(LotsProgression,";",i);

        if (j>0) {

                ls=StringSubstr(LotsProgression,i,j-i);

                i=j+1;

                k++;

                ArrayResize(lots,k);

                lots[k-1]=StrToDouble(ls);

        } else {

                ls=StringSubstr(LotsProgression,i);

                k++;

                ArrayResize(lots,k);

                lots[k-1]=StrToDouble(ls);

                break;

        }

}



plen=ArraySize(lots);

}

I am unable to understand this logic or what actually it is.

PS: A friend liked my strategy and created this EA. But i lost both (EA and that coder friend's contact) so now i am trying to test my very basic coding knowledge, as i really want this Strategy to be coded again.

Simon Gniadkowski 2014.02.14 15:03 #1

qgmql:

I am trying to code an EA based on my own strategy, with the help of code from some other EAs and indis. but now stuck in one thing.

<removed>

Please use the SRC button to post code . . .

William Roeder 2014.02.14 15:28 #2

qgmql: I am unable to understand this logic or what actually it is.

extern string LotsProgression="0.1;0.1;0.2;0.3 ...

double lots[];     // [0]=0.1 [1]=0.1 [2]=0.2 [3]=0.3 [34]=661.1
int    plen;       // 35
int init(){ ... }

Splits the string at the semicolons, converts the substrings into doubles, and stores values into the dynamic array.

Qæs 2014.02.14 17:35 #3

The thing that you mentioned is ok. problem is in the rest of the code. I get two errors (in new metaeditor only).

'init' - function can be declared only in the global scope

and

'init' - function already defined and has body

Simon Gniadkowski 2014.02.14 17:59 #4

qgmql:

The thing that you mentioned is ok. problem is in the rest of the code. I get two errors (in new metaeditor only).

Sounds like you have declared init() inside another function and then defined it a second time . . .

Qæs 2014.02.14 21:06 #5

yes i've got that and corrected. Now getting error in timeframe code.

   //--- EA PARAMETERS
extern int      EA_TF=240;
extern bool     Forced_TF=True;


bool   TF;

     if(Forced_TF != True) TF = EA_TF;     //These two lines i think, have error.
     else TF = Period();                   //New metaeditor is not accepting "TF = EA_TF;" from above line.

If Forced_TF is true, then EA should trade and should get signals from mentioned timeframe only, even if active chart (on which i place EA) is opened in different timeframe. If value false, then it should work on any timeframe.

Parabolic SAR - Trend Parabolic SAR - Trend Parabolic SAR - Trend

Simon Gniadkowski 2014.02.14 22:14 #6

qgmql:

yes i've got that and corrected. Now getting error in timeframe code.

You have TF as a bool . .. but you are trying to set it to an int . . . try this . . .

   //--- EA PARAMETERS
extern int      EA_TF=240;
extern bool     Forced_TF=True;


int   TF;

     if(!Forced_TF) TF = EA_TF;     //These two lines i think, have error. 
     else TF = Period();            //New metaeditor is not accepting "TF = EA_TF;" from above line.

William Roeder 2014.02.14 23:57 #7

Post ALL the code or at least indicate the truncation. That IF/ELSE must be inside a function.

Qæs 2014.02.15 12:24 #8

@RaptorUK I've got you. and again everything ok with old editor, but new editor still giving one warning, quoted in code after error line,

//+------------------------------------------------------------------+
//|                                                   01Multi_EA.mq4 |
//|                      Copyright © 2004, MetaQuotes Software Corp. |
//|                                       http://www.metaquotes.net/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2004, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net/"
#property version   "1.00"
#property strict

//--- input parameters
input int      EA_TF=60;
input bool     Forced_TF=True;
input int      MagicNumber=12345;
input int      FastMA_Period=5;
input int      FastMA_Shift=0;
input int      FastMA_Method=1;
input int      FastMA_Price=0;
input int      SlowMA_Period=34;
input int      SlowMA_Shift=0;
input int      SlowMA_Method=1;
input int      SlowMA_Price=0;
input string   LotsProgression="0.01;0.02;0.03;0.04;0.05;0.06;0.07;0.08;0.09;0.10;0.11;0.12;0.13;0.14;0.15;0.16;0.17;0.18;0.19;0.20";
input bool     NewCycle=True;
input int      Limit_TP=50;
input bool     Use_TP=False;
input int      Limit_SL=50;
input bool     Use_SL=False;
input int      MaxSlippage=3;
input int      OrderTries=10;

int      TF, Plen;
double   TP, SL, pips2dbl, pips2point, pipValue, Slippage, Lots[];
         
//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
//----
 if(Forced_TF != True) TF = EA_TF;
      else TF = Period();
   int i,j,k;
   string ls;
   while (true) {
        j=StringFind(LotsProgression,";",i);
        if(j>0) {
                ls=StringSubstr(LotsProgression,i,j-i);    // <<<<<"possible use of uninitialized variable 'i'	01Multi_EA.mq4	46	38">>>>>

                i=j+1;
                k++;
                ArrayResize(Lots,k);
                Lots[k-1]=StrToDouble(ls);
        } else {
                ls=StringSubstr(LotsProgression,i);
                k++;
                ArrayResize(Lots,k);
                Lots[k-1]=StrToDouble(ls);
                break;
        }
   }


   Comment("Copyright © 2004, MetaQuotes Software Corp.");
   
   if (Digits == 5 || Digits == 3)
   {            
      pips2dbl = Point*10; pips2point = 10; pipValue = (MarketInfo(Symbol(),MODE_TICKVALUE))*10;
   } 
   else 
   {    
      pips2dbl = Point;   pips2point = 1; pipValue = (MarketInfo(Symbol(),MODE_TICKVALUE))*1;
   }
   
   Slippage = pips2dbl*MaxSlippage;
   TP = pips2dbl*Limit_TP;
   SL = pips2dbl*Limit_SL;
   
//----
   return(INIT_SUCCEEDED);
  }

@WHRoeder Pasted the whole code.

Simon Gniadkowski 2014.02.15 12:52 #9

qgmql:

@RaptorUK I've got you. and again everything ok with old editor, but new editor still giving one warning, quoted in code after error line,

@WHRoeder Pasted the whole code.

It's not an error it's a warning . . . to get rid of the warning initialise the variable rather than just declaring it. In mql4 when you declared a variable it was also initialised, now with mql4.5 you have to explicitly initialise the variable if you want to . . .

int i = 0, j, k;   //  i initialised to 0

Creating a script - Request Execution - Opening Request Execution - Opening

William Roeder 2014.02.15 14:30 #10

pipValue = (MarketInfo(Symbol(),MODE_TICKVALUE))*10;

Don't use tickvalue by itself https://www.mql5.com/en/forum/133792/page3#512466

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