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need expert help , increase lot

  • #1
  • First Post: Sep 22, 2007 11:32am Sep 22, 2007 11:32am
Hi, I need some help regarding coding expert advisor.

Let says initial condition:
lots = 0.1
opentrades = 0

Then, how to code this:

-------------------------------------------

checking trade

if previous trade profit resulting +ve money,
opentrades is reset to zero -> opentrades = 0
the lots also reset -> lots = 0.1

if previous trade profit resulting -ve money,
opentrades will increase to 1 -> opentrades = 1
the lots also increase -> lots = 0.2
sell or buy operation coding here with new lots

checking trades

if previous trade profit resulting +ve money,
opentrades is reset to zero -> opentrades = 0
the lots also reset -> lots = 0.1

if previous trade profit resulting -ve money,
opentrades will increase -> opentrades = 2
the lots also increase -> lots = 0.3
sell or buy operation coding here with new lots

and so on...

-------------------------------------------

I know the code on these word in italic only.

hope can give me guide for these programming...
  • #2
  • Sep 22, 2007 2:38pm Sep 22, 2007 2:38pm
Hello OxiG,

Look at the above post on API Trader. One of the guys fxtrader625 can be hired to progam for you if needed.

Hope this helps.

new2trading
  • #3
  • Sep 22, 2007 4:17pm Sep 22, 2007 4:17pm
This is for decreasing lot size if you suffer losses by decreasefactor, it should get you close, just make decreasefactor an increasefactor.
Inserted Code
 
extern double Lots = 1.0;
extern bool UseMoneyManagement = false;
extern bool AccountIsMicro = false;
extern int Risk = 0;
extern double DecreaseFactor = 0; 
 
 
 
 
 
//double subLotSize()
double CalcolaLot(int Risk)
{
if(UseMoneyManagement==false) return(Lots);
double lot=Lots;
int orders=HistoryTotal();
int losses=0;
int decimalPlaces=1;
if(AccountIsMicro==true) decimalPlaces=2;
lot=NormalizeDouble((AccountFreeMargin()*Risk/1000.0)/100,decimalPlaces);
if(DecreaseFactor>0)
{
for(int i=orders-1;i>=0;i--)
{
if(OrderSelect(i,SELECT_BY_POS,MODE_HISTORY)==false) { Print("Error in history!"); break; }
if(OrderSymbol()!=Symbol() || OrderType()>OP_SELL) continue;
//----
if(OrderProfit()>0) break;
if(OrderProfit()<0) losses++;
}
if(losses>1) lot=NormalizeDouble(lot-lot*losses/DecreaseFactor,decimalPlaces);
}
if(lot<0.1 && AccountIsMicro==false) lot=0.1;
if(lot<0.01 && AccountIsMicro==true) lot=0.01;
if(lot>99) lot=99;
return(lot);
}
  • #4
  • Sep 22, 2007 9:03pm Sep 22, 2007 9:03pm
Hello CEO and all,

Are there any good websites that teach you how to program the MT4 trading platform?

Thansk,

new2trading
  • #5
  • Sep 23, 2007 10:48am Sep 23, 2007 10:48am
Thanks CEO, the code will help me a lot. I'm trying to understand others coding on meta, still learning and learning.

To new2trading, u can learn the coding by looking the previous expert advisor or indicator. I'm learning from there too. And u can try to find templates of coding somewhere on the forum.
  • #6
  • Sep 23, 2007 10:57am Sep 23, 2007 10:57am
Metatrader is much like programming in the C language. Its just like coding any other application. There are plenty of examples on this site (some are well written and some are not). You just have to work at it and take the time to learn. If I can say one thing though, just find a way to make what you want work. Don't spend time trying to make it perfect. You'll never finish if you do that.

Hope that helps!
  • #7
  • Sep 23, 2007 11:30pm Sep 23, 2007 11:30pm
I tried to code like these, the lots is increase when the trade is negative (this is good)

but it did not reset the lots when the trade is positive, anybody can fix this code?

PHP Code
 if(OrderProfit()>0) losses=0;
        
         if(OrderProfit()<0) losses++;
         
         if(losses==0) Lots=0.1;
         if(losses==1) Lots=NormalizeDouble(Lots*2,1);
         if(losses==2) Lots=NormalizeDouble(Lots*2,1);
         if(losses==3) Lots=NormalizeDouble(Lots*2,1);
         if(losses==4) Lots=NormalizeDouble(Lots*2,1);
  • #8
  • Sep 29, 2007 11:06pm Sep 29, 2007 11:06pm
the code is ok now

but...i need to know a little more, how to restart the expert automatically using a code without push the expert button or restart the platform.?
  • #9
  • Last Post: Oct 1, 2007 11:29am Oct 1, 2007 11:29am
That is some good code in #3 - what needs to be added though to make it reset to the initial number of lots after a positive trade instead of just increasing lots with every trade?

Thatchman
Understanding is a three-edged sword
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