Heeeelp! heeeelp! - page 3

Everything works fine if i set a fixed lot size its fine but i want a dynamic lot size. So i thought out the above script but it does'nt work and i dont know the problem. @raptor i want to use $100 of the $1000 balance which i understand is 0.1 lot since my leverage is 1:100 but i want it dynamic so that if the system profits and balance becomes higher say new balance becomes $2000 i want it to now open trades with $200(0.2 lot) respecting the percentage i set i.e. 10%, 20% or any of balance/margin i set. @ onewithzachy ordersend is fine since it works if i set fixed lot size i.e.

double lots=0.1;

but when i try to dynamicise it like below it says wrong lot size. My account is micro and supports minimum 0.01 lot.

extern int LotPercentage=10; // use 10% of balance as lot size

int start()
{

double LotInBalance=(LotPercentage/100)*AccountBalance(); // find the amount that is 10% of balance lets assume its $1000
double LotUnits=LotBalance*AccountLeverage(); // multiply this 10% balance($100) by leverage to get lot units
double lots=NormalizeDouble((LotUnits/100000),2); // expected to return 0.1
/* divide this lot units by 100,000(standard lot size units) and normalize to 2 decimal places to get something like 0.1 if account balance is say $1000 for use in ordersend()*/

...

return 0;

}

Also this returns the same error while its even simpler

double lots;
double Balance=AccountBalance();
if(Balance<=500){lots=0.1;}                // If my account has $500 or less the lot will be 0.1
if(Balance<1500&&Balance>1000){lots=0.3;}
if(Balance<2500&&Balance>2000){lots=0.5;}
if(Balance<3500&&Balance>3000){lots=0.7;}
if(Balance<4500&&Balance>4000){lots=0.9;}
if(Balance<5500&&Balance>5000){lots=1.1;}
if(Balance<6500&&Balance>6000){lots=1.3;}
if(Balance<7500&&Balance>7000){lots=1.5;}
if(Balance<8500&&Balance>8000){lots=1.7;}
if(Balance<9500&&Balance>9000){lots=1.9;}
if(Balance>10000){lots=2;}                      // If account balance if over 10000 lot is 2

if(/*opening criteria met*/){
OrderSend(Symbol(),OP_BUY,lots,...)
}

Please read comments i have included in the code to understand better.

DO NOT DO THIS WITH REAL MONEY.

DO YOU WANT TO LOSE 10 % or OPEN POSITION WITH 10% ? (answer : the first one !)

double lots;                               // <<== value is zero
double Balance=AccountBalance();

if(Balance<=500){lots=0.1;}                // What the lots if Balance > 500 && <= 1000 ?

if(Balance<1500&&Balance>1000){lots=0.3;}  // read this carefully : if balance bigger than but not equal with 1000
                                           // AND balance also smaller but not equal than 1500.
                                           // Question : what's the lot if balance equal with 1000 and 1500 ?

Contract Size - MQL4 forum

I want to open position with 10% the same way someone can deposit $1000 in their account and open positions with 0.1 lot(10% if leverage is 1:100).

onewithzachy you are right i did modify it to the below and it worked but the strategy test came out poorer i guess its best to use fixed lots.

double Balance=AccountBalance();
if(Balance<=500||(Balance>500&&Balance<1000)){lots=0.1;}
if((Balance<=1500&&Balance>=1000)||(Balance>1500&&Balance<2000)){lots=0.3;}
if((Balance<=2500&&Balance>=2000)||(Balance>2500&&Balance<3000)){lots=0.5;}
if((Balance<=3500&&Balance>=3000)||(Balance>3500&&Balance<4000)){lots=0.7;}
if((Balance<=4500&&Balance>=4000)||(Balance>4500&&Balance<5000)){lots=0.9;}
if((Balance<=5500&&Balance>=5000)||(Balance>5500&&Balance<6000)){lots=1.1;}
if((Balance<=6500&&Balance>=6000)||(Balance>6500&&Balance<7000)){lots=1.3;}
if((Balance<=7500&&Balance>=7000)||(Balance>7500&&Balance<8000)){lots=1.5;}
if((Balance<=8500&&Balance>=8000)||(Balance>8500&&Balance<9000)){lots=1.7;}
if((Balance<=9500&&Balance>=9000)||(Balance>9500&&Balance<10000)){lots=1.9;}
if(Balance>10000){lots=2;} 

I think you have a big misunderstanding of how things work . . . Margin requirement and Risk are not the same thing . . . if you create a position size based on a Margin requirement of $100 and your trade loses you can lose very much more, or less, than your $100 . . . Margin requirement changes with leverage . . . Risk does not.

No wait it did add some turbo i had tested it wrongly. It would be great if i could calculate it using one formula rather than tons of if statements. Is it possible to derive a formula?

ok risky in some situations e.g. in 2012 would have lost with turbo but gained without

Which is the safest way?

Yes, plot your points on a graph and then you can work out a linear equation for it in the form y = mx + c

To do what . . . . you haven't actually explained what you want to do . . despite being asked specific questions . . . if you ignore questions that are asked so you can be helped then you will be ignore very quickly.