MQL4 - automated forex trading   /  

Forum

Login | Register | Language: ru cn en
Check MetaTrader Market in order to find your Expert Advisor

Alternating OP_BUY & OP_SELL Orders

Back to topics list To post a new topic, please log in or register
avatar
322
wackena 2006.09.10 17:01
 
I'm writing an EA to alternate buy and sell orders. I can code to alternate orders when there is a history, but not from first start of EA. This is the base simple code. How do I code to alternate orders?

if(OrderType()==OP_SELL) Buy=true;
 
if(OrderType()==OP_BUY) Sell=true;

Thanks,
Wackena
 
Enhancing the Quality of the Code with the Help of Unit Test

Enhancing the Quality of the Code with the Help of Unit Test

Even simple programs may often have errors that seem to be unbelievable. "How could I create that?" is our first thought when such an error is revealed. "How can I avoid that?" is the second question which comes to our mind less frequently. It is impossible to create absolutely faultless code, especially in big projects, but it is possible to use technologies for their timely detection. The article describes how the MQL4 code quality can be enhanced with the help of the popular Unit Testing method.

avatar
Moderator
5702
stringo 2006.09.11 11:39 #
 
Buy=false;
Sell=false;
 
if(OrderType()==OP_SELL) Buy=true;
 
if(OrderType()==OP_BUY) Sell=true;
avatar
322
wackena 2006.09.11 18:21 #
 
stringo wrote:
Buy=false;
Sell=false;
 
if(OrderType()==OP_SELL) Buy=true;
 
if(OrderType()==OP_BUY) Sell=true;

Stringo,
I've been using your code suggestion, but that is not my problem. The problem is when the EA starts and there are no open orders, OrderType() then would have no data. After first order, then above code works great. It is just how do I get by that first order. Right now, I start EA with a different code just to get first order and then modify code as above. Then EA runs as intended.

Wackena
 
avatar
Moderator
5702
stringo 2006.09.12 13:11 #
 

May be check for last closed order?

avatar
322
wackena 2006.09.12 15:33 #
 
stringo wrote:

May be check for last closed order?


Stringo,

In my EA there are other signals needed to trigger order. Those signals along with code below now works OK.

Thanks for your helpful idea.

Wackena

int hstTotal=HistoryTotal();
Buy=false;
Sell=false;
 
if(hstTotal==0 || OrderType()==OP_SELL) Buy=true;
 
if(hstTotal==0 || OrderType()==OP_BUY) Sell=true;

 
avatar
5
cha 2011.03.22 14:06 #
 

hello plz i need help

How can I change ea If he should buy, he sells and if he should sell he buys. "Buy" to "Sell" and "Sell" to "Buy" in the EA-Editor???


plz
 
avatar
3027
qjol 2011.03.22 14:55 #
 
cha:

hello plz i need help

How can I change ea If he should buy, he sells and if he should sell he buys. "Buy" to "Sell" and "Sell" to "Buy" in the EA-Editor???


plz

replace OP_BUY to OP_SELL & vice versa just for the record reversing the EA doesn't make a losing EA to be profitable

 
avatar
9454
WHRoeder 2011.03.22 16:27 #
 
int hstTotal=HistoryTotal();
Buy=false;
Sell=false;
 
if(hstTotal==0 || OrderType()==OP_SELL) Buy=true;
You can not call OrderType() unless you have an orderSelect before.
    datetime lastClosePrev;
    int      lastCloseType;
    for(int pos=0; pos < HistoryTotal(); pos++) if (
        OrderSelect(pos, SELECT_BY_POS, MODE_HISTORY)   // Only orders w/
    &&  OrderCloseTime()    > lastClosePrev             // not yet processed,
    &&  OrderMagicNumber()  == magic.number             // my magic number
    &&  OrderSymbol()       == Symbol()                 // and my pair.
    &&  OrderType()         <= OP_SELL){    // Avoid cr/bal forum.mql4.com/32363
        lastClose = OrderCloseTime();
        lastCloseType = OrderType();
    }

avatar
5
cha 2011.03.22 16:41 #
 
qjol:

replace OP_BUY to OP_SELL & vice versa just for the record reversing the EA doesn't make a losing EA to be profitable


plz can u make it
Attached files:
  5matf_1.mq4  (10.58 KB)
avatar
9454
WHRoeder 2011.03.23 15:57 #
 

No slaves here, either learn to code or pay someone.

There are several posters here.

There is the mql5 coders section

DelphiScalper.com recommended:

Rentacode.com
Elance.com
ProgrammingForex.com

 
Back to topics list  

To add comments, please log in or register