decrease factor's algorithm

[univetsity]

dear gurus:I am an newbie in MQL4,just find an method of cut positions when lossing, the code as follows:
extern double DecreaseFactor = 10;
int losses=0;
if(DecreaseFactor>0)
{
for(int i=orders-1;i>=0;i--)
{
if(OrderSelect(i,SELECT_BY_POS,MODE_HISTORY)==fals e) { 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,1);
}
however，I use it to backtrack,the results disorient me.
the follow are some trade log:
type order no size price profit balance
buy 1 2.00 1.3345 0.00 50000.00
close 1 2.00 1.3272 -1555.74 48444.26
sell 2 1.90 1.3297 0.00 48444.26
close 2 1.90 1.3361 -1292.00 47152.26
buy 3 1.50 1.3354 0.00 47152.26
close 3 1.50 1.3315 -656.81 46495.45
sell 4 1.30 1.3306 0.00 46495.45
close 4 1.30 1.2956 4436.60 50932.05

the question is :
2 is the default size in my EA,but what the "lot" stands for in the equation, 2 or the latest size?
why the order 4's size becomes 1.30?

PLs gurus show arithmetic process,TKS!

[Enivid]

If that's the same EA that you've listed here, then your Lot size depends not only on this equation with the decrease factor but also on the amount of free margin available:
lot=NormalizeDouble(AccountFreeMargin()*MaximumRis k/100.0,1);

But it still doesn't make much sense... Care to attach this EA .mq4 file with all the input parameters you are using?

[univetsity]

Originally Posted by Enivid

If that's the same EA that you've listed here, then your Lot size depends not only on this equation with the decrease factor but also on the amount of free margin available:
lot=NormalizeDouble(AccountFreeMargin()*MaximumRis k/100.0,1);

But it still doesn't make much sense... Care to attach this EA .mq4 file with all the input parameters you are using?

it's the same equation,that just because I wanna when ordeprofit>0,the next order's positon should largen,when lossing the position should reduction.
however,some guys say the "losses" in the equation
"if (OrderProfit()<0) losses++;"
stands lossing amount of loss,others say it is the lossing order's N.O.
this is why I ask losses stands what,and in my log why the order 4's position is 1.3 pls gurus help me.

[Enivid]

Please attach the whole EA (.mq4 file) if you want to get a definite answer.

[univetsity]

Originally Posted by Enivid

Please attach the whole EA (.mq4 file) if you want to get a definite answer.

I have attached the modifycc.mq4 in here
profitable ea couldn't increase position pls gurus point out method.
just the same file. TKS!

[Enivid]

In the file attached there, DecreaseFactor = 3, not 10. So, what is it? And the starting balance is 5000, right?

[univetsity]

Originally Posted by Enivid

In the file attached there, DecreaseFactor = 3, not 10. So, what is it? And the starting balance is 5000, right?

the trade log is produced by DecreaseFactor=10,and the starting balance is 50,000. lot=NormalizeDouble(AccountFreeMargin()*MaximumRis k/500.0,1);

My question I have listed in 3# tks!

[Enivid]

The it's all correct. The cycle inside LotsOptimized() calculates the number of losing orders met in a row. Initially we have 50,000 free margin and DecreaseFactor = 10:

1. lot = 50000 * 0.02 / 500 = 2
since losses <= 1, we don't do anything else.
2. lot = 48444.26 * 0.02 / 500 = 1.93 = 1.9 after normalizing
since losses <= 1, we don't do anything else.
3. lot = 47152.26 * 0.02 / 500 = 1.88 = 1.9 after normalizing
losses > 1, lot = 1.9 - 1.9 * 2 / 10 = 1.52 = 1.5 after normalizing
4. lot = 46495.45 * 0.02 / 500 = 1,85 = 1,9 after normalizing
losses > 1, lot = 1.9 - 1.9 * 3 / 10 = 1,33 = 1,3 after normalizing

[univetsity]

thank you for your help to show the cycle correctly,but now when I backtracking EURUSD on 01.01.2011-03.26.2011 M5 the starting balance is 50,000 by add.mq4,it produce some results amazing me again.
I modified the decrease factor=3,and
if(losses>=1) lot=NormalizeDouble(lot-lot*losses/DecreaseFactor,1);

my question is why the third order's lot is 2?
I think it should count like this,
lot=50180*0.02/500=2,
since losses=1,lot=2-2*1/3=1.34=1.3 after normalizing
confused:

[univetsity]

unconsciously, I found just the model will affect order's lots.
using the add.mq4,all other factors are same,(eurusd, m5 ,01.01.2011-26.03.2011)but under each tick model, the log's 77-78 line will get as the attachment.(lot is 2.1)
gurus can contrast the openprice model 's report I attached in the 9#(77-78line the order's lot is 1.0),I am appeciating for explain this.add another question:when living trading,it will follow which model?each tick or open price and other?
I have this equation code
//---- go trading only for first tiks of new bar
if(Volume[0]>1) return;
I think it would limit only openprice model taking effect.
but why the demo backtracketing test have differernt result under differernt model?
I am an newbie,so don't laugh at me.confused: