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Conveting Mq4 files to Ex4 Files - page 2

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ogeben
7
ogeben  
Viffer:

Click compile

V

please I have an issue. I created an EA with an online EA builder, on compiling there was 0 errors with few warnings. how do I get it to compile ignoring the warnings or how do I correct them... I don't know a bit of coding mq4
William Roeder
20344
William Roeder  
  1. EA builder, EATree, fxDreema, FxPro, Online Forex Expert Advisor Generator, Quant, Visual Trader Studio, MQL5 Wizard, etc. are all the same. You will get something quick, but then you will spend a much longer time trying to get it right, than if you learned the language up front, and then just wrote it.
    • Since you haven't learned MQL4/5, therefor there is no common language for us to communicate.
      If we tell you what you need, you can't code it.
      If we give you the code, you don't know how to integrate it into yours.
      We are willing to HELP you when you post your attempt (using SRC) and the nature of your problem, but we are not going to debug your hundreds of lines of code. You are essentially going to be on your own.

    • EA builder makes bad code counting up while closing multiple orders.
      EA builder makes bad code Bars is unreliable (max bars on chart) volume is unreliable (miss ticks) Always use time. New candle - MQL4 forum
      EA builder makes bad code, not adjusting for 4/5 digit brokers, TP/SL and slippage.
      EA builder makes bad code, not adjusting for ECN brokers. (pre-Build 500)
      EA builder makes bad code, not checking return codes.
      EATree uses objects on chart to save values - not persistent storage (files or GV+Flush.) No recovery (crash/power failure.)
    Learn to code it or or pay (Freelance) someone to code it.

  2. result=OrderSend(Symbol(),OP_BUY,Lots,Ask,Slippage,0,0,"EA Generator www.ForexEAdvisor.com",MagicNumber,0,Blue);
        
    if(result>0)
    
       OrderSelect(cnt, SELECT_BY_POS, MODE_TRADES);
    
       OrderModify(OrderTicket(),OrderOpenPrice(),Bid-TrailingStop*MyPoint,OrderTakeProfit(),0,Green);
    
    Check your return codes for errors, report them and you would know why. Don't just silence the compiler, it is trying to help you.
              What are Function return values ? How do I use them ? - MQL4 and MetaTrader 4 - MQL4 programming forum
              Common Errors in MQL4 Programs and How to Avoid Them - MQL4 Articles
    Only those functions that return a value (e.g. iClose, MarketInfo, etc.) must you call ResetLastError before in order to check after.

  3.   for(int cnt=0;cnt<OrdersTotal();cnt++)
    
    In the presence of multiple orders (one EA multiple charts, multiple EAs, manual trading,) while you are waiting for the current operation (closing, deleting, modifying) to complete, any number of other operations on other orders could have concurrently happened and changed the position indexing:
    1. For non-FIFO (US brokers,) (or the EA only opens one order per symbol,) you can simply count down in a position loop, and you won't miss orders. Get in the habit of always counting down.
                Loops and Closing or Deleting Orders - MQL4 and MetaTrader 4 - MQL4 programming forum
      For FIFO (US brokers,) and you (potentially) process multiple orders per symbol, you must count up and on a successful operation, reprocess all positions (set index to -1 before continuing.)
    2. and check OrderSelect in case earlier positions were deleted.
                What are Function return values ? How do I use them ? - MQL4 and MetaTrader 4 - MQL4 programming forum
                Common Errors in MQL4 Programs and How to Avoid Them - MQL4 Articles
    3. and if you (potentially) process multiple orders, must call RefreshRates() after server calls if you want to use the Predefined Variables (Bid/Ask) or OrderClosePrice() instead, on the next order/server call.

  4.      if (OrderMagicNumber()==MagicNumber) result++;
    
    Using OrdersTotal directly and/or no Magic number filtering on your OrderSelect loop means your code is incompatible with every EA (including itself on other charts and manual trading.)
              Symbol Doesn't equal Ordersymbol when another currency is added to another seperate chart . - MQL4 and MetaTrader 4 - MQL4 programming forum
              MagicNumber: "Magic" Identifier of the Order - MQL4 Articles

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